Columbia subject headings:
Philosophy.
Harvard subject headings:
Philosophy
Soviet Union--Economic conditions--1917-1945.
Soviet Union--Politics and government--1917-1936.
World War, 1939-1945.
Princeton subject headings:
Philosophy.
Soviet Union--Economic conditions--1917-1945.
Soviet Union--Politics and government--1917-1936.
World War, 1939-1945.