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