- Bortstieber, Gertrud4
- Capra, Frank4
- Pallai, Péter3
- Samizdat Archives3
- Hanák, Péter2
- Nóvé, Béla2
- Radio Free Europe/Radio Liberty, Inc - Research Institute2
- Baker, Nina Brown1
- Balkan Section1
- Balogh, Eva S.1
- British Broadcasting Corporation, Written Archive Centre1
- Bykov, N.1
- Cianfarra, Camille Maximilian1
- Communist International (Comintern)1
- Czechoslovak Republic. Ministerstvo zahraničních věcí1
- Dallin, David J.1
- Eppstein, John1
- Great Britain, Foreign and Commonwealth Office1
- Hegedüs, András1
- Koestler, Arthur1