Columbia subject headings:
United States--Social conditions--1945-
United States--Social conditions--1960-1980.
United States--Social policy.
Harvard subject headings:
United States--Social conditions--1960-1980.
United States--Social conditions--1980-2020
United States--Social policy.
Princeton subject headings:
United States--Social conditions--1960-1970.
United States--Social conditions--1970-.
United States--Social policy.