Columbia subject headings:
Public opinion--United States.
United States--Politics and government--1945-1989--Public opinion.
United States--Social conditions--1960-1980--Public opinion.
United States--Social conditions--1980-2020--Public opinion.
Harvard subject headings:
Public opinion--United States
United States--Politics and government--1945-1989--Public opinion.
United States--Social conditions--1960-1980--Public opinion
United States--Social conditions--1980-2020--Public opinion
Princeton subject headings:
Public opinion--United States.
United States--Politics and government--1945-1989--Public opinion.
United States--Social conditions--1960-1980--Public apinion.
United States--Social conditions--1980-2020--Public opinion.