Columbia subject headings:
China--Foreign relations--Mongolia.
Mongolia--Foreign relations--China.
Mongolia--Foreign relations--Soviet Union.
Mongolia--History--Independence movement, 1911.
Soviet Union--Foreign relations--Mongolia.
Harvard subject headings:
China--Foreign relations--Mongolia.
Mongolia--Foreign relations--China.
Mongolia--Foreign relations--Soviet Union.
Mongolia--History--Independence movement, 1911
Soviet Union--Foreign relations--Mongolia.
Princeton subject headings:
China--Foreign relations--Mongolia.
Mongolia--Foreign relations--China.
Mongolia--Foreign relations--Soviet Union.
Mongolia--History--Independence movement, 1911.
Soviet Union--Foreign relations--Mongolia.