- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)1,360
- Radio Free Europe/Radio Liberty, Inc - Research Institute22
- Samizdat Archives20
- Csákó, Mihály16
- Soviet Red Archives10
- Đorđević, Aleksandar10
- Nóvé, Béla8
- Visnews8
- UPTIN7
- Leningradskaia Studiia Dokumentalnykh Filmov (LSDF)6
- Open Media Research Institute5
- Samizdat Archives of Radio Free Europe5
- Lennauchfilm4
- Pallai, Péter4
- Pastor, Peter4
- Philipp, Tibor4
- Tsentralnaia Studiia Dokumentalnykh Filmov (TsSDF)4
- Tsentrnauchfilm4
- Ajtony, Árpád3
- Hanák, Péter3