Study Search Results Your query returned 3 results. Series results are grouped under the most relevant study. You can ungroup series results. Results per page: 25 50 100 Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. (?) Study Title/Investigator 1. Census of Population and Housing, 1970 [United States]: Fifth Count Extract (27 States) (ICPSR 7966) United States Department of Commerce. Bureau of the Census 2. Census of Population and Housing, 2000 [United States]: Summary File 4, California (ICPSR 13516) United States Department of Commerce. Bureau of the Census 3. Office of Revenue Sharing: Fifth Count File, 1970 (ICPSR 77) DUALabs, Inc.