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. Most Downloaded (?) Study Title/Investigator 1. County Statistics File 1 (CO-STAT): [United States] (ICPSR 8314) United States Department of Commerce. Bureau of the Census 2. County Statistics File 2 (CO-STAT 2): [United States] (ICPSR 8662) United States Department of Commerce. Bureau of the Census 3. Home Heating Costs of the Rural Elderly in Michigan, 1980 (ICPSR 9051) Douglass, Richard L.