Columbia subject headings:
Vietnam War, 1961-1975--United States.
Vietnam--History--1945-1975.
Vietnam.
Harvard subject headings:
Vietnam (Democratic Republic)--History.
Vietnam War, 1961-1975--Vietnam (Democratic Republic)
Princeton subject headings:
Vietnam (Democratic Republic)
Vietnam War, 1961-1975--United States.
Vietnam--History--1945-1975.