Columbia subject headings:
Harvard subject headings:
Nineteen seventies--Congresses.
Political culture--United States--History--20th century--Congresses.
Political science--United States--History--20th century--Congresses.
United States--Politics and government--1945-1989--Congresses.
United States--Politics and government--20th century--Congresses.
Princeton subject headings:
Nineteen seventies--Congresses.
Political culture--United States--History--20th century--Congresses.
Political science--United States--History--20th century--Congresses.
United States--Politics and government--20th century--Congresses.