Columbia subject headings:
Europe--Foreign relations--Soviet Union--Sources.
Soviet Union--Foreign relations--1917-1945--Sources.
Soviet Union--Foreign relations--Europe--Sources.
Soviet Union--Politics and government--1917-1936--Sources.
T︠S︡K RKP(b)--History--Sources.
T︠S︡K VKP(b)--History--Sources.
Harvard subject headings:
Europe--Foreign relations--Soviet Union--Sources.
Soviet Union--Foreign relations--1917-1945--Sources.
Soviet Union--Foreign relations--Europe--Sources.
Soviet Union--Politics and government--1917-1936--Sources.
T͡SK RKP(b)--History--Sources.
T︠S︡K VKP(b)--History--Sources.
Princeton subject headings: