- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)1,230
- Radio Free Europe/Radio Liberty, Inc - Research Institute21
- Samizdat Archives19
- Csákó, Mihály14
- Tsentralnaia Studiia Dokumentalnykh Filmov (TsSDF)13
- Soviet Red Archives10
- Nóvé, Béla8
- Lennauchfilm7
- Philipp, Tibor7
- Open Media Research Institute6
- Pastor, Peter5
- Samizdat Archives of Radio Free Europe5
- Group Inconnu4
- Leningradskaia Studiia Dokumentalnykh Filmov (LSDF)4
- Monitoring Unit4
- Hanák, Péter3
- Hungarian Ministry of the Interior3
- Jakab, Lajos3
- Pallai, Péter3
- Radio Free Europe and Radio Liberty, Inc.3