Columbia subject headings:
China--Foreign relations--Soviet Union.
China--Foreign relations--Vietnam.
Soviet Union--Foreign relations--China.
Soviet Union--Foreign relations--Vietnam.
Vietnam--Foreign relations--China.
Vietnam--Foreign relations--Soviet Union.
Vietnam--Politics and government.
Harvard subject headings:
China--Foreign relations--Soviet Union.
China--Foreign relations--Vietnam (Democratic Republic)
Soviet Union--Foreign relations--China.
Soviet Union--Foreign relations--Vietnam (Democratic Republic)
Vietnam (Democratic Republic)--Foreign relations--China.
Vietnam (Democratic Republic)--Foreign relations--Soviet Union.
Vietnam (Democratic Republic)--Politics and government.
Princeton subject headings:
China--Foreign relations--Soviet Union.
China--Foreign relations--Vietnam (Democratic Republic).
Soviet Union--Foreign relations--China.
Soviet Union--Foreign relations--Vietnam (Democratic Republic).
Vietnam (Democratic Republic)--Foreign relations--China.
Vietnam (Democratic Republic)--Foreign relations--Soviet Union.
Vietnam (Democratic Republic)--Politics and government.