- Soviet Union--Economic policy--1928-1932 (5)
- Soviet Union--Economic policy--1933-1937 (5)
- Soviet Union--Economic policy--1917-1928 (3)
- Soviet Union--Politics and government--1917-1936 (3)
- Collectivization of agriculture--Soviet Union--History (1)
- Peasantry--Soviet Union--Social conditions (1)
- Soviet Union--Economic conditions--1917-1945 (1)
- Soviet Union--Rural conditions (1)