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Your query returned 4 studies. Series results are grouped under the most relevant study. Ungroup series results to view all results.

2.
Census of Population and Housing, 1990 [United States]: Public Use Microdata Sample: 3-Percent Elderly Sample (ICPSR 6219)
United States Department of Commerce. Bureau of the Census
3.
County-Level Estimates of the Population Aged Sixty Years and Over by Age, Sex, and Race, 1977-1980 (ICPSR 7955)
Inter-university Consortium for Political and Social Research
4.
Historical Urban Ecological Data, 1830-1930 (ICPSR 35617)
Costa, Dora L; Fogel, Robert W

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