- Open Society Archives at Central European University22
- Open Media Research Institute19
- Radio Free Europe/Radio Liberty, Inc - Research Institute11
- Samizdat Archives10
- Monitoring Unit7
- Csákó, Mihály5
- Fekete Doboz Alapítvány5
- Soviet Red Archives5
- Samizdat Archives of Radio Free Europe4
- Group Inconnu3
- Pallai, Péter3
- Philipp, Tibor3
- Radio Free Europe and Radio Liberty, Inc.2
- Witness, Inc.2
- Ajtony, Árpád1
- BBC1
- Bozóki, András1
- British Broadcasting Corporation, Written Archive Centre1
- Domaniczky, Endre1
- Enyedi, Zsolt1