- Radio Free Europe/Radio Liberty, Inc - Research Institute12
- Nóvé, Béla7
- Bortstieber, Gertrud5
- Gábor Magos5
- Soviet Red Archives5
- Judith Gimes4
- Samizdat Archives4
- Pallai, Péter3
- de Héderváry, Claire3
- Balogh, Eva S.2
- Csákó, Mihály2
- Hanák, Péter2
- British Broadcasting Corporation, Written Archive Centre1
- Bíró, András1
- Cséry, László1
- Geréb, Anna1
- Great Britain, Foreign and Commonwealth Office1
- Hegedüs, András1
- Hungarian Ministry of the Interior1
- Magos, Gábor1