- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)828
- Tsentralnaia Studiia Dokumentalnykh Filmov (TsSDF)15
- Lennauchfilm13
- Open Society Archives at Central European University9
- Leningradskaia Studiia Dokumentalnykh Filmov (LSDF)8
- Tsentrnauchfilm5
- Bortstieber, Gertrud3
- Stalin, Joseph3
- Belarusfilm2
- Geréb, Anna2
- Kievskaia Kinostudiia Nauchno-populiarnykh Filmov2
- Pallai, Péter2
- Trotsky, Leon2
- Ukrainskaia Studiia Khronikalno-dokumentalnykh Filmov2
- Baberowski, Jörg1
- Bazilevich, K. V.1
- Bourdeaux, Michael1
- British Broadcasting Corporation, Written Archive Centre1
- Bálint, József1
- Béládi, László1