"study number","owner","title","investigators","doi","time period"
"08108","ICPSR","Census of Population and Housing, 1980 [United States]:  County Population by Age, Sex, Race, and Spanish Origin","United States Department of Commerce. Bureau of the Census","http://dx.doi.org/10.3886/ICPSR08108.v1","1980"
"08282","ICPSR","Census of Population and Housing, 1980 [United States]:  Summary Tape File 4A","United States Department of Commerce. Bureau of the Census","http://dx.doi.org/10.3886/ICPSR08282.v4","1980"
"08229","ICPSR","Census of Population and Housing, 1980 [United States]:  Summary Tape File 4B Extract","United States Department of Commerce. Bureau of the Census","http://dx.doi.org/10.3886/ICPSR08229.v2","1980"
"08426","ICPSR","Census of Population and Housing, 1980 [United States]: Summary Tape File 4C SMSA Extract ","United States Department of Commerce. Bureau of the Census","http://dx.doi.org/10.3886/ICPSR08426.v3",""