- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)311
- Tsentralnaia Studiia Dokumentalnykh Filmov (TsSDF)13
- Lennauchfilm12
- Leningradskaia Studiia Dokumentalnykh Filmov (LSDF)9
- Dallin, David J.3
- Pipes, Richard3
- Salisbury, Harrison E.3
- Van der Post, Laurens3
- Conference on the Russian Revolution2
- Crankshaw, Edward2
- Daniels, Robert Vincent2
- Deutscher, Isaac2
- Fischer, Louis2
- Florinsky, Michael T.2
- Grimsted, Patricia Kennedy2
- Gunther, John2
- Katkov, George2
- Kennan, George F.2
- Kotkin, Stephen2
- Krivitsky, W. G.2