All manuscripts utilizing data made available through the Consortium should acknowledge that fact as well as identify the original collector of the data. The ICPSR Council urges all users of the ICPSR Data facilities to follow some adaptation of this statement with the parentheses indicating items to be filled in appropriately or deleted by the individual user.

The data (and tabulations) utilized in this (publication) were made available (in part) by the Inter-university Consortium for Political and Social Research. The data for Census of Population and Housing [United States]: Summary Tape File 3 were originally collected by the U.S. Department of Commerce, Bureau of the Census. Neither the collectors of the original data nor the Consortium bear any responsibility for the analyses or interpretations presented here.

In order to provide funding agencies with essential information about the use of archival resources and to facilitate the exchange of information about ICPSR participants' research activities, each user of the ICPSR data facilities is expected to send two copies of each completed manuscript or thesis abstract to the Consortium. Please indicate in the cover letter which data were used.

U.S. Dept. of Commerce. Bureau of the Census:

• Census of Population and Housing, 1980 (United States): Summary Tape File 3A (ICPSR 8071)
• Census of Population and Housing, 1980 (United States): Summary Tape File 3B (ICPSR 8318)
• Census of Population and Housing, 1980 (United States): Summary Tape File 3C (ICPSR 8038)
• Census of Population and Housing, 1980 (United States): Summary Tape File 3D (ICPSR 8157)
• Census of Population and Housing, 1980 (United States): SummaryTape File 3D Congressional District-Level Extract (ICSPR 8710)
• Census of Population and Housing, 1980 (United States): Summary Tape File 3H (ICPSR 8402)

Summary Tape File 3 consists of five sets of files that contain detailed tabulations of the nation's population and housing characteristics produced from the 1980 Census. The series consists of Summary Tape Files (STF) 3A, 3B, 3C, 3D, and 3H. The files contain sample data inflated to represent the total population; "100 percent counts" and unweighted sample counts are also provided for certain characteristics.

Complete-count data are included for demographic data such as age, race, sex, marital status, and Spanish origin, and for housing information such as the number of rooms at the address, occupancy status, property value, number of rooms, and plumbing facilities. Sample data inflated to represent the total population are provided for other topics: education, language, ancestry, employment, transportation, and income, plus detailed Information on housing characteristics.

All datasets in the STF3 series have identical record formats and technical characteristics (except for the omission of 100 percent counts from STF3B). Substantive data variables are organized in the form of 150 "tables" that are accompanied by standard geographic identification variables. The various collections differ only in the types of geographical areas for which the data are summarized.

STF3A provides summaries for the States or state equivalents; Counties or county equivalents; minor civil divisions (MCDs) or census county divisions (CCDs); places or place segments within MCD/CCDs or remainders of MCD/CCDs; census tracts or block numbering areas; block groups or enumeration districts; places; and Congressional Districts. An additional STF 3A file for Puerto Rico is also available from ICPSR. The information in this file is similar to but not identical with the data for the 50 states and the District of Columbia. This file is documented in a separate codebook.

STF3B provides summaries for each 5-digit ZIP code area in numeric order within each state. The data are summarized at the state, Standard Metropolitan Statistical Area (SMSA), and county levels.

STF3C is a national file containing summaries for the following levels: United States, Census Regions, Census Divisions, States, Standard Consolidated Statistical Areas (SCSAs), SMSAs, urbanized areas (UAs), counties, places of 10,000 or more, MCDs of 10,000 or more (in eleven selected states), and Congressional Districts.

STF3D provides summaries for state or state equivalent; Congressional District (as constituted for the 98th Congress); county or county equivalent; places of 10,000 or more people; and minor civil divisions or census county divisions. STF3H is a supplement to 3D; it supplies data for the ten States (California, Hawaii, Louisiana, Maine, Mississippi, Montana, New Jersey, New York, Texas, and Washington) that were redistricted for the 99th Congress.

STF3A, STF3B, and STF3D ate each comprised of 51 separate files: one for each state, plus the District of Columbia. STF3C consists of one nationwide data file containing information about all states. STF3H contains 10 files, one for each state covered. Each logical record in these collections consists of 12,096 characters, and is divided into six "record segments" of 2,016 characters. The number of records in each file varies by state. Class IV

Summary Tape File 3 (STF 3) is one of a series of summary data files available from the 1980 census. The file contains sample data inflated to represent the total population and is composed of five parts -- STF 3A, STF 3B, STF 3C, STF 3D and STF 3H. These parts have identical tables and format, except for the omission of ,100-percent counts for population and housing in STF 3B, but present the data for different geographic areas.

Additional information concerning this file may be available at a later date. If you have purchased this documentation (with or without tape purchase) from the Census Bureau and wish to receive these User Notes, please complete the coupon below specifying which files and States you ordered.

Mail to: Data User Services Division Data Access and Use Staff Bureau of the Census Washington, D.C. 20233

Note: Only coupons from original copies of this documentation will be honored

Name of File: Census of Population and Housing, 1980:
Summary Tape File 3

-----------File A------------File C
State(s):

Please send me any information which might become available later concerning the file listed.

Name:
Address:
Phone:

This documentation was prepared within the Data Access and Use Staff, under the direction of James P. Curry, Chief, and Barbara J. Aldrich, Chief of its Technical Information Section. Annette Ralston was the coordinator for this file assisted by Edward Hightower, Yvonne Wade, Joann Sutton, Barbara Shugart, Jean Pope, and Mary Kilbride. It was partially adapted from materials prepared by David Silver, Stephen E. Goldman, and Eleanor Banks of Decennial Census Division, Thomas Harahush and Harold Yamauchi of Statistical Methods Division, and staff members of Data User Services Division. Support was provided through content review by staff members from Decennial Census Division, Geography Division, Housing Division, Population Division, and Statistical Methods Division.

The files should be cited as follows:

Census of Population and Housing, 1980: Summary Tape File 3A (Name of State) [machine-readable data file] / prepared by the Bureau of the Census. -Washington: The Bureau [producer and distributor], 1982.

Census of Population and Housing, 1980: Summary Tape File 3B (Name of State) [machine-readable data file] / prepared by the Bureau of the Census. -Washington: The Bureau [producer], 1982; National Planning Data Corporation and others [distributor], 1982.

Census of Population and Housing, 1980: Summary Tape File 3C [machine-readable data file] / prepared by the Bureau of the Census. -Washington: The Bureau [producer and distributor], 1982.

This technical documentation should be cited as follows:
Census of Population and Housing, 1980: Summary Tape File 3 Technical Documentation / prepared by the Data User Services Division, Bureau of the Census. -Washington: The Bureau, 1982.

For additional information concerning the files, contact Data User Services Division, Customer Services (Tapes), Bureau of the Census, Washington, D.C. 20233. Phone: (301) 763-4100.

For additional information concerning the technical documentation, contact Data User Services Division, Data Access and Use Staff, Bureau of the Census, Washington, D.C. 20233. Phone: (301) 763-2074.

For additional information concerning the subject matter of the file, contact Population Division, (301) 763-7962, or Housing Division, (301) 763-2873, Bureau of the Census, Washington, D.C. 20233.

This section will contain information relevant to Summary Tape File 3 which becomes available after the file is released.

User Notes will be sent to all users who (1) purchased their files (or technical documentation) from the Census Bureau and (2) returned the original copy of the coupon located inside the front cover of this documentation.