Columbia subject headings:
Vietnam War, 1961-1975--Civilian relief.
Vietnam War, 1961-1975--Refugees.
Harvard subject headings:
Vietnam War, 1961-1975--Civilian relief
Vietnam War, 1961-1975--Refugees
Princeton subject headings:
Vietnam War, 1961-1975--Civilian relief.
Vietnam War, 1961-1975--Refugees.