- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)11,343
- Samizdat Archives27
- Radio Free Europe/Radio Liberty, Inc - Research Institute22
- Csákó, Mihály17
- Tsentralnaia Studiia Dokumentalnykh Filmov (TsSDF)16
- Đorđević, Aleksandar12
- Soviet Red Archives11
- Samizdat Archives of Radio Free Europe10
- Leningradskaia Studiia Dokumentalnykh Filmov (LSDF)9
- Lennauchfilm9
- Nóvé, Béla8
- Open Media Research Institute8
- United States. Department of State8
- Visnews8
- Geller, Mikhail7
- Gorbachev, Mikhail Sergeevich7
- Hegedüs, András7
- Miłosz, Czesław7
- Philipp, Tibor7
- UPTIN7