- Soviet Union--Economic conditions--1917-1945 (12)
- Soviet Union--Politics and government--1917-1936 (12)
- Soviet Union--Social conditions (5)
- Communism--Soviet Union (2)
- Economic history (2)
- Soviet Union--Economic policy--1928-1932 (2)
- Socialism--Soviet Union (1)
- Soviet Union--Description and travel (1)
- Soviet Union--Economic policy (1)
- Soviet Union--Economic policy--1933-1937 (1)
- Soviets (Councils) (1)
- World War, 1939-1945--Soviet Union (1)