- Radio Free Europe/Radio Liberty, Inc - Research Institute11
- Soviet Red Archives5
- Samizdat Archives4
- Pallai, Péter3
- de Héderváry, Claire3
- Balogh, Eva S.2
- Gábor Magos2
- Hanák, Péter2
- Bortstieber, Gertrud1
- British Broadcasting Corporation, Written Archive Centre1
- Bíró, András1
- Great Britain, Foreign and Commonwealth Office1
- Judith Gimes1
- Magos, Gábor1
- Open Media Research Institute1
- Samizdat Archives of Radio Free Europe1