Columbia subject headings:
Harvard subject headings:
United States--Politics and government
United States--Politics and government--1974-1977
United States--Social conditions--1960-1980
United States--Social conditions--1960-1980.
United States--Social conditions--1980-2020
United States--Social policy
Princeton subject headings:
United States--Politics and government--1974-.
United States--Social conditions--1960-.
United States--Social policy.