Columbia subject headings:
Harvard subject headings:
United States--Census, 1990
United States--Census, 1990.
United States--Population--Statistics
United States--Social conditions--1980-2020--Statistics
Princeton subject headings:
Statistics.
United States--Census, 1990.
United States--Economic conditions--1981---Statistics.
United States--Population--Statistics.
United States--Social conditions--1980-2020--Statistics.