Columbia subject headings:
United States--Social conditions--1960-1980.
United States--Social conditions--1980-2020.
United States--Social policy--1980-1993.
Harvard subject headings:
United States--Social conditions--1960-1980
United States--Social conditions--1980-2020
United States--Social policy--1980-1993
Princeton subject headings:
United States--Social conditions--1960-.
United States--Social policy.