Columbia subject headings:
Harvard subject headings:
United States--Foreign relations--Vietnam.
United States--Politics and government--1961-1963.
United States--Politics and government--1963-1969.
Vietnam War, 1961-1975.
Vietnam--Foreign relations--United States.
Princeton subject headings:
United States--Politics and government--1961-1963.
United States--Politics and government--1963-1969.
Vietnam War, 1961-1975--United States.