Columbia subject headings:
Cambodia--Politics and government--1975-1979.
Communism--Cambodia--History.
Political atrocities--Cambodia.
Harvard subject headings:
Cambodia--History--1975-
Cambodia--History--1975-1979.
Cambodia--History--Civil War, 1970-1975
Khmer (Southeast Asian people)
Princeton subject headings:
Cambodia--Politics and government--1979-.
Communism--Cambodia--History.
Political atrocities--Cambodia.