Columbia subject headings:
Cambodia--History--1975-1979.
Norodom Sihanouk, Prince, 1922-2012.
Harvard subject headings:
Cambodia--Foreign relations--Vietnam.
Cambodia--History--1975-
Communism--Cambodia.
Norodom Sihanouk, Prince, 1922-2012.
Vietnam--Foreign relations--Cambodia.
Princeton subject headings:
Cambodia--History--1979-.
Norodom Sihanouk, Prince, 1922-2012.