Columbia subject headings:
Soviet Union--Foreign relations--1917-1945.
Harvard subject headings:
Lenin, Vladimir Ilʹich, 1870-1924
Soviet Union--Foreign relations--1917-1945.
Soviet Union--History.
Soviet Union--Politics and government--1917-1936.
Stalin, Joseph, 1878-1953
Princeton subject headings:
Soviet Union--Foreign relations--1917-1945.