- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)1,188
- Open Society Archives at Central European University26
- Héderváry, Claire de25
- Samizdat Archives19
- Open Media Research Institute18
- Radio Free Europe/Radio Liberty, Inc - Research Institute10
- Csákó, Mihály9
- Samizdat Archives of Radio Free Europe9
- Soviet Red Archives8
- Monitoring Unit7
- Philipp, Tibor6
- American Refugee Committee5
- Vajda, Júlia5
- Fekete Doboz Alapítvány4
- Group Inconnu4
- Nóvé, Béla4
- Lenin, Vladimir Il'ich3
- Meter, Barbara3
- Nickel, Gitta3
- Pallai, Péter3