Columbia subject headings:
Harvard subject headings:
China--Foreign relations--Dalʹnevostochnai︠a︡ Respublika.
Dalʹnevostochnai︠a︡ Respublika--Foreign relations--China.
Mongolia--History
Ungern-Sternberg, Michael von, Baron, 1870-1921.
Princeton subject headings:
Dalʹnevostochnai︠a︡ Respublika.
Mongolia--History.