- Soviet Union--Politics and government--1917-1936 (3)
- Communism--Soviet Union (2)
- Soviet Union--Economic conditions--1917-1945 (2)
- Soviet Union--Social conditions (2)
- Socialism--Soviet Union (1)
- Soviet Union--Economic conditions--1918-1945 (1)
- Soviet Union--Economic policy--1928-1932 (1)
- Soviet Union--Economic policy--1933-1937 (1)
- Soviet Union--Social conditions--1917- (1)
- Soviets (Councils) (1)
- no value (1)