- Balogh, Eva S.2
- British Broadcasting Corporation, Written Archive Centre1
- Bíró, András1
- Csákó, Mihály6
- Cséry, László1
- Geréb, Anna1
- Great Britain, Foreign and Commonwealth Office1
- Hanák, Péter2
- Hegedüs, András1
- Hungarian Ministry of the Interior1
- Nóvé, Béla7
- Open Media Research Institute1
- Pallai, Péter3
- Philipp, Tibor1
- Privát Fotó és Film Alapítvány1
- Radio Free Europe and Radio Liberty, Inc.1
- Radio Free Europe/Radio Liberty, Inc - Research Institute18
- Samizdat Archives6
- Samizdat Archives of Radio Free Europe2
- Soviet Red Archives8