Columbia subject headings:
Cambodia--History--1975-1979.
China--Foreign relations--Indochina.
Indochina--Foreign relations--China.
Harvard subject headings:
Cambodia--History--1975-
Cambodia--History--1975-1979.
Cambodia--History--1979-1993
China--Foreign relations--Indochina.
Indochina--Foreign relations--China.
Princeton subject headings:
Cambodia--History--1975-1979.
Cambodia--History--1979-.
China--Foreign relations--Indochina.
Indochina--Foreign relations--China.