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