References
- Fitzpatrick , Sheila , ed. 1978 . Cultural Revolution in Russia, 1928–1931 Bloomington , Indiana
- S. V. and Utechin , Patricia , eds. 1963 . What Is To Be Done 42 Oxford
- John Barber, Soviet Historians in Crisis, 1928–1931 (Macmillan, 1981). 194 pp.