Publications based on ICPSR data collections should acknowledge those sources by means of bibliographic citations. To ensure that such source attributions are captured for social science bibliographic utilities, citations must appear in footnotes or in the reference section of publications. The bibliographic citation for this data collection is: U.S. Dept. of Commerce, Bureau of the Census. Census of Population and Housing, 1980 [United States]: Summary Tape File 1A [Computer file]. ICPSR version. Washington, DC: U.S. Dept. of Commerce, Bureau of the Census [producer], 1982. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2002.

To provide funding agencies with essential information about use of archival resources and to facilitate the exchange of information about ICPSR participants' research activities, users of ICPSR data are requested to send to ICPSR bibliographic citations for each completed manuscript or thesis abstract. Please indicate in a cover letter which data were used.

The original collector of the data, ICPSR, and the relevant funding agency bear no responsibility for uses of this collection or for interpretations or inferences based upon such uses.

United States Department of Commerce. Bureau of the Census; Census of Population and Housing, 1980 [United States]: Summary Tape File 1A (ICPSR 7941)

Summary: Summary Tape File (STF) 1 consists of four sets of computer-readable data files containing detailed tabulations of the nation's population and housing characteristics produced from the 1980 Census. This series is comprised of STF 1A, STF 1B, STF 1C, and STF 1D. All files in the STF 1 series are identical, containing 321 substantive data variables organized in the form of 59 "tables," as well as standard geographic identification variables. All of the data items contained in the STF 1 files were tabulated from the "complete count" or "100-percent" questions included on the 1980 Census questionnaire. All four groups of files within the STF 1 series have identical record formats and technical characteristics and differ only in the types of geographical areas for which the summarized data items are presented. STF 1A provides summaries for state or state equivalent, county or county equivalent, minor civil division/census county division (MCD/CCD), place or place segment within MCD/CCD or remainder of MCD/CCD, census tract or block numbering area (BNA) or untracted segment within place, place segment or remainder or MCD/CCD, and block group (BG) or BG segment or enumeration district (ED). This file contains 57 data files, one for each state, the District of Columbia, Puerto Rico, and the United States possessions, which include American Samoa, Guam, Northern Mariana Islands, the Trust Territory of the Pacific Islands, and the Virgin Islands. The information on the United States possessions is similar but not identical to the other data and is documented in a separate codebook. Puerto Rico is also documented by a separate codebook.

Universe: All persons and housing units in the United States.

Note: (1) Records in Parts 1-56 consist of 3,276 characters and have two record segments (physical records) of 1,638 characters each. Records in Part 72 consist of 2,700 characters and have two record segments of 1,638 characters each. Records in Parts 60, 66, 69, 75, and 78 consist of 3,438 characters and have two record segments of 1,719 characters each.

(2) SAS and SPSS data definition statements are for all parts except for Puerto Rico and outlying areas.

(3) The codebooks are provided by ICPSR as Portable Document Format (PDF) files. The PDF file format was developed by Adobe Systems Incorporated and can be accessed using PDF reader software, such as the Adobe Acrobat Reader. Information on how to obtain a copy of the Acrobat Reader is provided on the ICPSR Web site.

Extent of Collection: 57 data files + machine-readable documentation (PDF) + SAS data definition statements + SPSS data definition statements.

Extent of Processing: SCAN/ REFORM.DOC/ DDEF. ICPSR

Data Format: Logical Record Length with SAS and SPSS data definition statements. Parts: Part numbers correspond to FIPS codes of states File Structure: rectangular Cases: varies by file.Variables: approx. 321 Record Length: 1,638 Records Per Case: 2 Part 81: Codebook for All Parts except Puerto Rico and Outlying AreasCensus of Population and Housing, 1980: Summary Tape File 1 Technical Documentation Washington, D.C.; 1981.

Note: The 1980 census figures are subject to change, pending the outcome of litigation. Counts of the population by race and Spanish origin in this file are provisional. Final counts will be determined after the sample data have been processed. U.S. Department of Commerce Malcolm Baldrige, Secretary Joseph R. Wright, Jr., Deputy Secretary William A. Cox, Acting Chief Economist Bureau of the Census Daniel B. Levine, Acting Director Bureau of the Census Daniel B. Levine, Acting Director Data User Services Division Michael G. Garland, Chief Marshall L. Turner, Jr., Assistant Chief for User Services