Columbia subject headings:
United States--Politics and government--1945-1989.
United States--Social conditions--1960-1980.
Harvard subject headings:
United States--Politics and government--1945-1989
United States--Politics and government--1945-1989.
United States--Social conditions--1960-1980
United States--Social conditions--1960-1980.
Princeton subject headings:
United States--Politics and government--1945-1989.
United States--Social conditions--1960-.