- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)3,468
- Lennauchfilm3
- Kotkin, Stephen2
- Tsentralnaia Studiia Dokumentalnykh Filmov (TsSDF)2
- Applebaum, Anne1
- Belarusfilm1
- Brooks, Jeffrey1
- Conquest, Robert1
- Filatova, I. I.1
- Fitzpatrick, Sheila1
- Gibert, Stephen P.1
- Komaromi, Ann1
- Leningradskaia Studiia Dokumentalnykh Filmov (LSDF)1
- Library of Congress. Congressional Research Service. Senior Specialists Division1
- Lovell, Stephen1
- Mosnauchfilm1
- Odesskaia Kinostudiia1
- Sebag Montefiore, Simon1
- Shub, Anatole1
- Sverdlovskaia Kinostudiia1