- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)24
- Samizdat Archives7
- Samizdat Archives of Radio Free Europe5
- Héderváry, Claire de2
- Open Media Research Institute2
- Open Society Archives at Central European University2
- Radio Free Europe/Radio Liberty, Inc - Research Institute2
- Soviet Red Archives2
- Alfred A. Reisch1
- Bulgarian Unit1
- Csákó, Mihály1
- Dudow, Slatan1
- Esposito, Fernando1
- Forced Migration Projects1
- Hanák, Péter1
- Hervé, Rodolf1
- Honcoop, Haruna1
- Information Services Department1
- Kóthy, Judit1
- Lanzmann, Claude1