Columbia subject headings:
Communism--Soviet Union.
Communism.
Soviet Union--Economic conditions.
Soviet Union--Politics and government.
Soviet Union--Social conditions.
Harvard subject headings:
Communism--Soviet Union
Communism.
Soviet Union--Economic conditions--1917-1945.
Soviet Union--Economic conditions.
Soviet Union--Politics and government--1917-1936.
Soviet Union--Politics and government.
Soviet Union--Social conditions--1917-1945.
Soviet Union--Social conditions.
Princeton subject headings:
Communism--Soviet Union.
Communism.
Soviet Union--Economic conditions.
Soviet Union--Politics and government.
Soviet Union--Social conditions.