Columbia subject headings:
United States--History--1945---Congresses.
Vietnam War, 1961-1975--United States--Congresses.
Harvard subject headings:
United States--History--1945---Congresses.
Vietnam War, 1961-1975--United States--Congresses.
Princeton subject headings:
United States--History--1945---Congresses.
Vietnam War, 1961-1975--United States--Congresses.