Columbia subject headings:
Harvard subject headings:
China--Boundaries--Soviet Union.
China--Foreign relations--Soviet Union.
Soviet Union--Boundaries--China.
Soviet Union--Foreign relations--China.
Zhenbao Island.
Princeton subject headings:
China--Boundaries--Soviet Union.
China--Foreign relations--Soviet Union.
Soviet Union--Boundaries--China.
Soviet Union--Foreign relations--China.
Zhenbao Island.