Columbia subject headings:
Vietnam War, 1961-1975.
War--Environmental aspects--Southeast Asia.
Harvard subject headings:
Environmental impact statements.
Vietnam War, 1961-1975--Environmental aspects.
Vietnam War, 1961-1975.
War--Environmental aspects
War--Environmental aspects--Southeast Asia.
Princeton subject headings:
Vietnam War, 1961-1975.
War--Environmental aspects--Asia, Southeastern.