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NLS Database
Investigator CD-ROM User’s Manual for NLS Data July 2002 File size: 540.25 M Total files: 194 Table of Contents
It contains the Cohort field, a Manage Cohorts
button, and three buttons, Contents,
Variables, Text/Cdbk (Codebook). The data set to be used must be specified in
the Cohort field and the Manage
Cohorts button can be used to add, delete, and search for cohorts. The Contents, Variables, and Text/Cdbk
buttons switch between the active windows displayed in the lower portions of
the screen. These windows are used to manipulate the data for extraction
(Contents), display the results of manipulation and extraction (Variables), and
obtain help in the form of documentation (Text/Cdbk). In a Windows environment
switching active windows can also be accomplished simply by clicking in the
window. However, if the active window
'covers' one of the inactive windows or the inactive window is minimized, the
above buttons can be used to make the window active and bring it to the
forefront. If you loose track of one of the windows (Contents, Variables,
Text/Cdbk) and its button does not bring it to the forefront, go to the Window menu and choose Default. The screen will refresh its format similar
to that in Figure
1 but the contents of the each window will not be lost. You may then resize. The windows in the NLS
Database Investigator may be resized according to your preference. You must
decide for yourself what Windows layout you prefer. Once your preferences are
established they will remain that way rather then reverting to the default. It
may be easiest to begin with the Contents window maximized in order to select
an index for use, locate index terms, and select the terms for the search
strategy. Or you may wish to review the on-line, hypertext documentation first
in the Text/Cdbk window. Manage Cohorts buttonThe Manage Cohorts button,
when pressed, opens the Manage Cohorts window and makes it the active window on
the screen. From the Manage Cohorts window
the user can work with the individual cohorts in the PC's network neighborhood.
In the neighborhood, it can find and distinguish among those cohorts whose
location is already registered with the software from those who are not
registered. It can even distinguish among different versions of cohorts in the Creation Date field. Contents buttonThe Contents button, when
pressed, makes the Contents window the active window on the screen. The
Contents window is the principal window of the data retrieval program. It
allows the user to choose what documentation is displayed in the Text/Cdbk window and which index is used for
data retrieval and display in the Variables window.
Variables buttonThe Variables window displays the variables found when
a search is run or it displays the variables in an extract specification file
when that file is opened. "Name, Description, Record Type, Year, Reference
Number, and Question Name" information document the variables
displayed. Text/Cdbk buttonThe Text/Cdbk window shown in the Figure 2 above provides links
to this manual and to other documentation. Navigating
the Windows
In a Windows environment switching active windows can be accomplished
simply by clicking in the window. However, if the active window 'covers' one of
the inactive windows or the inactive window is minimized, the buttons below can
be used to make the inactive window active and bring it to the forefront. Each window can be minimized by clicking on the X in the size bar:
Next Steps
Select a Cohort to
investigate and begin developing a search strategy within the Contents
window. Or maximize the Text/Cdbk window and view on-line, hypertext
documentation.
Chapter 3
Starting Out
Specifying
a Data File for Use
In order to begin to
develop a search strategy, a data set, or cohort, must be specified in the
Cohort field. Depending on which of the three options were selected in "Setting Up the NLS Software," you may have to
insert the CD into you CD-ROM drive. Figure 3 shows the default
display for the Contents, Variables, and Text/Cdbk
windows. You may resize the windows
according to your preferences or click on the Window option in the menu bar and
choose a pre-specified command from its drop-down menu Cohort Field
To specify a cohort, use
the drop-down menu Figure
3 also shows the Text/Cdbk window displaying the NLS
Investigator User's Manual documentation. Manage Cohorts
When
you click on the Manage Cohorts button, the window in Figure
4 opens. If you have never used the software or you have no cohorts
registered with the software, when the window opens it will be blank. You must
begin by using the File menu and search your PC to find the cohorts (datasets)
that you have downloaded and (unzipped) decompressed on your hard drives,
and/or that are on the CD-ROM disc, and/or on your network drives. To begin,
move the cursor to Search for Cohorts. When you select Search for Cohorts from the File
menu, you will then be asked to specify what drive(s) you want to search for
existing datasets (cohorts): Hard Drives, CD-ROMS, Network Drives. You may
select one or all of the choices. Then the software will search the drive(s)
you specified and display the results, if any, in the window similar to Figure 5 below. Search Results
The results of the Search for Cohorts feature
identify the location (path, directory, name) and creation-date for each cohort
that resides within the network neighborhood (disk drives, cd-rom drives, and
network drives that you included in your search) of your PC. If there are
cohorts whose locations are already recognized and registered by the software,
those cohorts will appear in the window with a checkmark (see Figure 5). The cohorts in the
network neighborhood that are recognized but whose locations are not registered
by the software (and presently unavailable to it) will also appear in the
window but without a checkmark. To register a cohort, check its box. To un-register a
cohort, uncheck it box. The Creation Date
of the cohort may be used to distinguish among multiple releases or versions of
similar datasets.
Commands in the File Menu
Contents Window
The Contents window shown
in Figure 6 and maximized
in Figure 7 is the
principal window for data retrieval and is used to navigate among
documentation, indexes, and variable displays for a specified cohort. It
controls the selection of the components that are available for the selected
cohort. Depending on the cohort selected, different documentation and indexes
may be available. The contents window
is also used to develop a search strategy of selected variables. To work with the Contents window, it may be
best to maximize it as shown in Figure
7. When the Contents window
is maximized its three frames from top to bottom can be viewed better. The
frames from top to bottom are: 1.
The top frame or Components of the data set that include
available documentation and indexes to the variables that are available in the
data set. To select a specific index,
click on + Indexes expand the tree and display the contents of the available
indexes; then double-click on the desired index name; 2. The middle frame or Index Terms available in the selected Index, and a 'Search for'
engine to speed up variable selection; and 3. The bottom frame or Items (i.e., variables) selected from various indexes that are
being assembled into a Boolean search strategy. Selecting an IndexThe Components of the data set (top frame) allow the user to switch
access to the principal indexes of the data set and to select the documents to
appear in the Text/Cdbk window. The
available indexes may vary from one data set to another. For example, the 'Area of Interest' index
has replaced the previously used Record Type index. To view the contents of an
index, double-click on the index name and its contents will appear in the Index Terms frame (middle). The available indexes in
the currently selected data set are named: Any Word in Context is an index
to all words used in the variable title. The number of occurrences (Entries)
appears with the word. Area of Interest (formerly Record Type) is an index to categories
of variables that are grouped by areas of interest and assigned to the
variable. SurveyYear is an index
to variables used in a Survey year. Refnum is an index to variables by reference numbers, i.e.,
a number that is assigned to variables in order to locate them across survey
years. Qname is an index to variables by question name and locates them across
years. Locating Index TermsTo locate a desired term
in an index, scroll down to it in the middle frame by using the scroll bar. Or
search for a term, by using the Search
for field. Begin typing in the name
of the term in the Search for field
and the list will scroll down to the first occurrence of that combination of
letters. To include an index term in a Boolean search, left-click on a term to
highlight it and drag it down to the Item
frame (bottom) to select it. Variables
must be placed in the Item frame to
run a Boolean search on the variables.
If the Boolean search is successful, the variables associated with the
selected terms will be extracted for further examination and manipulation. The
variables extracted, as the result of a search, will appear in the Variables window. To view all occurrences of
a variable (Index term), double-click on its name. Each occurrence (equal to the number of Entries) of the variable
along with brief documentation will appear in the Variables window. above shows three variables each
selected from a different index. CHILD was selected from the Any Word in
Context index, 1998 from the Year index, and 2ND PREGNANCY from the Keyword in
Context index. Operators-Commands MenuA variable that appears in
the lower Item frame may be manipulated via the Operators-Commands pop-up menu.
To view the Operators-Commands pop-up menu, right-click on the desired item
name (variable) to highlight it and bring up the pop-up menu. The pop-up menu
is comprised of the following three parts: ·
Boolean operators at
the top; ·
Variable position
commands, in the middle; and ·
Strategic commands at
the bottom. Boolean
Operators
To change one of the
operators in the Operator column of the Search
Strategy frame, right-click on it and the operators-commands menu will
appear. To select a different operation (AND,
OR, NOT), move the highlight bar to it and click. It will change in the Operator column. Positioning
Variables
To change the position of
a variable in the Item column, right-click on it and the operators-commands
menu will appear. To move the variable in the list, move the highlight bar to
the choice (Move up or Move down) and click. The variable will move accordingly in the
Item column. Strategic
Commands
To clear all variables in the Item column, right-click anywhere in the
lower frame and the operators-commands pop-up menu will appear. Move the highlight bar to Clear and click and all the variables in the lower frame will disappear. To delete a variable in the Items list, right-click on the variable to
highlight it and bring up the operators-commands dialogue box. Move the
highlight bar to Delete and click. To run or apply the Boolean search strategy,
right-click anywhere in the lower frame and the operators-commands pop-up menu will
appear. Move the highlight bar to Apply and click. The search will be run and if the Boolean search is
successful, the variables associated with the selected terms will be extracted
and displayed in the Variables window for further examination and
manipulation. The Variables window will
appear displaying the variables. The
Variables Window
The Variables window
displays the variables resulting from a successful search or those saved in
previously tagged set when it is opened.
Variables appearing in the window may be saved, tagged for saving or
untagged, or examined in further detail. Tagging VariablesWhen a variable is tagged
a checkmark is placed in the checkbox in the left most column. When a variable is untagged, no checkmark
appears. To place a checkmark in
the checkbox, click in the box next to the desired variable. To remove a
checkmark, click in the box where the checkmark appears and it will disappear. To tag all variables at
the same time, right-click anywhere in the variables’ window and the Tagging
Pop-up Menu shown in Figure 10 will appear. Highlight the Tag All option or press <F5>. Multiple
Tagging Functions
In the Variables window,
multiple variables may be selected for tagging or untagging. All variables may also be tagged or untagged
at once. Figure 10 shows the four functions available to make multiple
selections. To tag or untag all
variables in the list, right-click
anywhere within the variables list window.
Move the pointer to the Tag All or Untag All and click. Checkmarks will
appear or disappear, appropriately. An
alternate method is to simply press <F5>
or <F6> when the Variables
List is the active window. To tag multiple but not
all variables, the variables must be selected.
Selected variables are those that are highlighted. ·
To highlight a
contiguous block of variables, click on the first one in the block then hold
down the <Shift> key and click on the last one in the
block. <Shift> + Click. When the block is highlighted, place the
pointer over one of the highlighted variables and right-click. The Tagging
Pop-up Menu will appear. Move the
pointer to the Tag Selected and click.
A checkmark will appear next to those selected. An alternate method is that when all the
desired variables are highlighted, <F3>
may be pressed to place the checkmarks. ·
To highlight
non-contiguous variables, hold down the <Alt> key and click on
each variable to highlight. <Alt> + Click. When the
non-contiguous variables are highlighted, place the pointer over one of the
highlighted variables and right-click. The Tagging Pop-up Menu will appear. Move the pointer to the Tag Selected and click. A checkmark will appear next to those
selected. An alternate method is that
when all the desired variables are highlighted, <F3> may be pressed to place the checkmarks. Saving VariablesTo save tagged variables,
click on File in the menu bar, move
the highlight bar to Save Tagset…
and click. The standard Windows dialogue box will appear asking you to name
the file and specify the location of the file to save. An extension, in this instance for the
NLSY79 public releases, ".ythpub" will be attached to the extract
specification files (tagsets) used to store variables Each cohort will have a unique identifier. All other extensions
stay as they were. To see a list of file name extensions, see Appendices, File Names. Examining VariablesTo view a single variable
in detail, double-click on it in the Variables
window and it will appear in the Text/Cdbk
window. Or, highlight the variable in the Variables window by right-clicking
on it. The Tagging Pop-up menu will appear as shown in Figure 10 above. Move the highlight bar to Codebook and click to
see the codebook description of the variable. An alternate method to bring up
the codebook display is to press <F2>
when a variable is highlighted. Text/Cdbk Window
The Text Codebook
window is a browser, but you cannot change the URL that appears in the URL
field. The browser is limited to browsing the documentary material associated
with the cohort specified in the Cohort field. The buttons that appear next to
the URL field in the the Text Codebook window perform standard browser
functions. All hyperlinks that appear in the Text Codebook window are active
and may be followed by clicking on them. Browser Buttons
The codebook display of a variable
appears in the Text/Cdbk window shown in Figure
11. Notice how
closely the codebook documentation resembles the question in the survey. This is because the OSU CAPI for Questionnaire Design is a self-documenting system
in which each question-response pair becomes a meta-datum documenting itself.
Information that
identifies the variable is found at the top of the codebook display: Variable
number, Variable label, Question number, Year used, Record type (or Area of
Interest), and Variable name. Variables related to the
current one are mentioned as 'see' references in the middle of the of the
display: e.g., SEE R(26048.). The frequencies of the
responses selected, including Refusals and Don't Knows, and Valid/Invalid Skips
complete the codebook description of the variable. (See cohort specific Users'
Guide, section "Accessing Variables By Codebook", for a detailed
explanation of codebook conventions.) Detailed information from
the codebook can be used to determine if the variable is one to keep in the
extract specification file or if it should be discarded. The Back and Forward buttons
control what is displayed in the Text/Cdbk window. Like in you Internet browser, Back will go back to the previous
display in the window, if applicable, and Forward will go to the next one, if
applicable. To go back to the
Variables window, press the Variables
button on the Navigation bar. To go to the Contents window, press the Contents button. Next Steps
After completing a search
and creating an extract specification file, the next step is to setup and run the extract.
Chapter
4
Performing an Extract
Specifying a Tagset
To perform an extract, an
existing tagset must be open. To open a
tagset, go to the File component of the Menu bar and choose Open Tagset… Browse and select the desired tagset from the standard
Windows dialogue box. When the tagset
is open, go to the Extract component of the Menu bar and choose Extract Saved Variables. Before choosing to extract saved variables
you may wish to review them (and edit them) by choosing Review Saved Variables. When the function Extract
Saved Variables is activated, the screen shown below in the will appear.
From this window you may finalize the data file to be extracted in several
ways: ·
The sample universe of cases may
be qualified by limiting the number of cases in the sample and/or by pressing
the Edit Boolean Specification
to create a Boolean phrase (left half of window). ·
One of the file
characteristics for the
output file may be specified under the Extract
Data File Type portion of the window by clicking on a file type and
additional output files may be specified under the Optional Output File portion of the window. ·
Finally two options can
be carried out on the file: Run Extract or Write Codebook. The Menu Bar contains the
actions to carry out on the sample universe: Run Extract, Stop Extract, Write Codebook, and Exit the extract. The left half of the
window is used to qualify the sample universe of cases by limiting the range of
cases and by creating a Boolean Specification. The right half of the window is used to select the
format(s) of the output file. Information
about the extract file such as name, sample size (Number of variables and
Number of cases), output record length, and output file size is found in the
lower right half of the window. To make selections in the
extract window, press a button, click in a field and type in the limits, or
click on a radio button and or check box. ·
A Radio button ( ·
A Check box ( Specifying the Sample
Size
The left half of the
window allows the user to manipulate the size of the sample universe by combining
four methods. Each method is discussed below. Case Selection
The number of cases in the
sample universe may be changed in several ways. The number of cases selected for
the extract may be altered and a fraction of the cases may be selected for
extraction, the first and last cases read may be changed, and a Boolean
specification may be run against the variables in a case to include or exclude
them. Select Number of Cases To change the number of
cases read, ·
Place the cursor in the
Select 1 of every __ case(s) field;
and ·
Type the denominator
integer in the blank. Instead of always
beginning with the first case in the file
another may be specified as the beginning case. To change the first
case read, ·
Place the cursor in the
"First case to read" field
and ·
Type in the integer of
the first case to read. To change the last case
to read, ·
Place the cursor in the
"Last case to read" field;
and ·
Type in the integer of
the last case to read. When any or all of the
"selected number of cases", the "first case to read", or
the "last case to read" are changed and the cursor is placed in
another field, information in the "Number
of cases" field will change correspondingly. (Compare the number of
cases in and to the
right.) Boolean Qualification
When the “Edit Boolean Specification” button is pressed, the window shown in Figure 14 will appear. The Boolean phrase constructed will further
manipulate the sample universe by performing operations on the extracted
variables that are listed in the right box of the window. The Boolean phrase is
constructed in the top box by selecting variables from the list and qualifying
them with the Boolean and arithmetic operators listed, constants, and
variables. ·
Rules of arithmetic
syntax such as balanced parentheses must be followed. ·
The maximum length of
the Boolean string allowed is 255 characters.
If violations of syntax or
length occur, an error message will be displayed. Boolean Edit BoxIn the phrase is
constructed in the top box. You may type the information in the box, you may
use the buttons and variables displayed on this screen to select the variables
and operators, or you may use a combination of both. When a variable is
highlighted in the list box on the right, the Description of the variable will
appear across the bottom of the screen (e.g., 2nd PERIOS OF PAID
LEAVE…). To place one of the extracted variables (e.g., R5266600) in the
construction box at the top, double-click on it in the box on the
right. (You may also select a variable
by clicking on the Variable
button. The Variable field will appear
with the Accept and Cancel buttons. Then select it from the list in the
drop-down menu To place one of the operators (e.g., >) in the construction box, type
it, or click once on its button. To place a constant (e.g., 0) in the construction box, type it, or click
on the Constant button. (When you click on the Constant button, the
constant field will appear with the Accept and Cancel buttons. Use the 5 or 6to increase or decrease the number in the field and
press the Accept button when the
number is correct.) To
edit the Boolean Phrase
In the top box, place the
cursor at the location in the phrase where the edit will occur and click to
activate the text cursor. You may now begin typing to insert, or press Delete to delete the next character,
etc/ In standard Windows fashion, double-clicking over a variable or operator
will select the whole term by highlighting it and you can delete it or begin
typing to replace the selection. When the phrase is
complete, press the Exit button to
exit and save the Boolean specification. Or, press the Quit button to exit and not save the Boolean specification. Data File Type Specification
Output file specifications may be
changed. Each specification available for a selected cohort is listed in the
right half of the window in . In the Extract Data File Type
portion of the window the desired extract file type is selected. Depending on the size of the Cohort selected
and the form of the compression used, some extract file types may not be
available (e.g., SAS and SPSS). The extract file types are mutually exclusive.
That means that if the radio button for one extract data file type is toggled
‘ON’ ( In the Optional Output Files portion of the
window one or more file types may be selected by placing a check mark in the
check box ( Data Extract FormatsThe following file
formats are available in the Extract Data File Type portion of
the window. ·
A formatted ASCII
file is a raw file in which each datum is located in a fixed position, i.e.,
column, in each record. ·
A delimited ASCII
file is a raw file
in which each datum is separated by a comma. This format can be read by many
statistical packages, spreadsheets, and programming languages. ·
A DBASE 3 file is a database
file that can be read by DbaseÒ software. ·
A Stata Dictionary
is a file that can be used with Stata software. Depending on the cohorts
available, their size, and due to various forms of compression on the CD the
following options may be displayed: ·
SASÒ control cards
describes a file that can be generated to read the binary data file directly
from the compact disk. These can be used to run PC-SASÒ to perform any desired SASÒ procedure such as creating a SASÒ system file. (This specification conserves disk
space because it eliminates the need to create a raw file on the PC hard disk
that will ultimately be used to create a SASÒ system file.) ·
SPSSÒ control cards describes a file that can be generated
to read the binary data file directly from the compact disk. These can be used
to run SPSSÒ to perform any desired
SPSSÒ procedure such as
creating a SPSSÒ
system file. Note: The
SAS and SPSS control statements generated include basic data location, label
and missing value information. While every attempt has been made to provide
“read-to-use” statements, the platform and version of your specific
installation may require modification of these generic control programs. Please
consult your local SPSS or SAS coordinator for site-specific problems. File Size InformationIn the right half of the
window, lower portion, information about the extract file is displayed in the
fields listed below. The original size of the sample universe and output file
size appears when the window appears. As the size of the sample universe is
changed, this information is reflected in the fields. Other fields display the length of the record in the file and the
output file name. ·
Number of variables ·
Number of cases ·
Output record length ·
Output file size ·
Output file name ActionsSeveral actions may be
carried out on the extract file. The
buttons in the menu bar controls these actions. ·
Run Extract
begins the extract. ·
Stop Extract
cancels the running extract. ·
Write Codebook produces the codebook for the extract specification
file. ·
Exit
abandons all processing and closes this window. Run Extract
Carefully read the screen
to assure that all selected specifications are correct. When they are correct,
press the Run Extract button. Figure 18 shows the extract
operation in-progress. Information
about the progress of the extract will appear at the bottom left of the screen. The Stop Extract button becomes active and the extract may be aborted
when it is pressed. Summary information on the
extract run will appear at the end of processing. This information includes the
resulting number of cases read, cases kept, and elapsed time. The resulting
output files are listed by name. Press the Exit button to close the window and
return to the Extract window. Write CodebookNormally the Codebook file
of the extract file is produced automatically.
But when only the codebook is desired, this button can be used without
running the extract. When the Write Codebook button is pressed, no
window appears on the screen. A codebook file is
created and placed in the directory where the software was installed. This file
contains a codebook representation of the variables in the extract file. The
name of this codebook file is the same file name as extract file with a .CDB
extension, e.g., [filename].CDB. NOTE: This
codebook file should not be confused with the complete codebook file created
when the Write Documentation function is
selected from the File component of the Main Menu screen. The file name of the
complete codebook will be specified at the time of creation. Exit this MenuWhen the Exit button is
pressed, the user is returned to the Main Menu screen. Next Step
Chapter
5 - Write Documentation
or view sample extract files: chld-88-2ndpreg.CDB, chld--88-2ndpreg.DCT, chld-88-2ndpreg.DOC,
chld-88-2ndpreg.SAS, chld-88-2ndpreg.SPS.
Chapter 5
Write Documentation
When the Write Documentation function is selected
from the File component of the Menu bar, the Create Documentation
Files window appears and allows the user to select from a number of
documentation options. The buttons at the top of
the window perform the actions on the files.
To specify an Output Location,
type it in the box or use the Browse button to browse for the output locations. The Create Codebook check box will create the complete codebook for the
data set selected in the Cohort box on the Main Menu. Caution: the data sets are large and a codebook for the complete
data will be a large file. The tabs in the middle of
the window control the type of documentation produced and the format. The Index
Options Tab - creates documentation for one or more indexes. The List Options
Tab - creates documentation for the variable names and or the
question names. The Field Widths
Tab - allows the user to specify the format of the output. Index Options TabUse the Index Options tab to select the index
for which documentation will be produced. When an index is checked additional
fields appear defining the default output file name, file size, and the default
number of lines per page. The Output Filename and Lines
per Page may be edited. Simply type in them to edit or use the arrows to
increase or decrease the number of lines per page. If the Create Codebook box is checked, the
same additional information appears for it.
The boxes may also be edited. To
create the files specified, press the Create
Files button. Or choose another tab for
more documentary options. List Options TabUse the List Options tab to select print out of
the lists of the variable names. When a list is checked
additional fields appear defining the default output file name, file size, and
the default number of lines per page. The boxes may be edited.
Simply type in them to edit or use the arrows to increase or decrease the
number of lines per page. To specify an Output Location, type it in the box or use the Browse button to
browse for the output locations. To create the files
specified, press the Create Files
button. Field Widths Tab
Use the Field Widths tab to customize the
output files. A field may be excluded with a width of '0' or the width of the
field maybe be changed by typing in a new integer. Figure 23 to the right displays the default field
widths. To create the files
specified, press the Create Files
button.
Appendices
Appendix 1
NLS Database Investigator - Main Menu CommandsMenu Components
In addition, to the Command
menus above, the Manage Cohorts window contains a register of command under the
File menu. Manage Cohorts -- Menu Components
Appendix 2
File NamesAfter
selecting one of the options and naming the extract specification file, a
three-letter default file extension will automatically be attached
to the name entered. Depending on what data set was originally chosen in the
Cohort field, the file extension for the extracted specification file will be
one listed in the Extract File Types below. The name of the current working file
is identified in the NLS Database Investigator Title Bar
(blue bar) as [Tagset: file-name]. If it is a new file the file name will be
"untitled" until it is given a name when the "Extract Tagged
Variables" option is activated. Extract File TypesThe extension
depends on the data set used.
All files
subsequently created in conjunction with the extract file will use the same
8-letter filename, and depending on the file type to be created, one of the
following extensions will be attached.
Documentation FilesBelow is a complete list
of files that can be produced when the ‘Write Documentation" option is
chosen from the File component of the Main Menu. Documentation files are given
the default extension of .txt. Most of
these files are enormous so if you want to produce them be sure you have enough
room on your PC. The
"anyword.txt" file alone is 1.1 Gb!
Appendix 3Sample Files GeneratedThe following sample
extract files were created as a result of Performing
an Extract on the file set up in Chapter
4. The files displayed in this section are.
Chld--88-2ndpreg.CDB
Chld--88-2ndpreg.DCT
Chld--88-2ndpreg.DOC
Chld--88-2ndpreg.SAS
Chld--88-2ndpreg.SPS
Last Modified Date: September 10, 2002 - 11:18 AM
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) is a
button that when clicked excludes other choices in the list.
) is a
button that when clicked selects the option listed.
