RT Research Data T1 Census of Population and Housing, 1990 (United States): Tiger/Census Tract Comparability File LA English PP Erscheinungsort nicht ermittelbar PB [Verlag nicht ermittelbar] YR 1992 UL https://krimdok.uni-tuebingen.de/Record/190280094X AB This collection identifies changes in United States census tracts between 1980 and 1990. The data were derived from the Census Bureaus's TIGER database. Counties with 1980 and 1990 census tracts are not included if there were no changes in the census tract boundaries and/or census tract numbers between 1980 and 1990. Also excluded are counties with census tracts defined for the first time in 1990. K1 census county divisions K1 census data K1 census tract level K1 Geographic information systems K1 population characteristics K1 Forschungsdaten DO 10.3886/ICPSR09810.v1