I was Stalin's agent - Krivitsky, W. G. (Walter G.), 1899-1941. ([London] : H. Hamilton, 1939)
HU OSA 300 - RFE/RL collection
Keywords: Russia (1923- U.S.S.R.). -- Ob"edinennoe gosudarsvennoe politicheskoe upravlenie; Soviet Union -- Politics and government -- 1917-1936.