- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)1,405
- Radio Free Europe/Radio Liberty, Inc - Research Institute20
- Samizdat Archives18
- Csákó, Mihály14
- Tsentralnaia Studiia Dokumentalnykh Filmov (TsSDF)13
- Soviet Red Archives10
- Nóvé, Béla8
- Philipp, Tibor7
- Lennauchfilm6
- Open Media Research Institute6
- Fokin, Vladimir5
- Pastor, Peter5
- Samizdat Archives of Radio Free Europe5
- Group Inconnu4
- Jakab, Lajos4
- Leningradskaia Studiia Dokumentalnykh Filmov (LSDF)4
- Monitoring Unit4
- Hanák, Péter3
- Hungarian Ministry of the Interior3
- Kemény, István3