- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)32
- Gunther, John2
- Lennauchfilm2
- Brooks, Jeffrey1
- Farukshin, Midkhat Khabibovich1
- Gruzinskaia Studiia Nauchno-populiarnykh i Dokumentalnykh Filmov1
- Kievskaia Kinostudiia Nauchno-populiarnykh Filmov1
- Križanić, Juraj1
- Leningradskaia Studiia Dokumentalnykh Filmov (LSDF)1
- Lewytzkyj, Borys1
- Odesskaia Kinostudiia1
- Parry, Albert1
- Rosefielde, Steven1
- Tsentralnaia Studiia Dokumentalnykh Filmov (TsSDF)1
- Tsentrnauchfilm1
- Tukhachevskii, M. N.1
- Yanov, Alexander1
- Zalewski, Wojciech1