- Radio Free Europe/Radio Liberty, Inc - Research Institute5
- Bortstieber, Gertrud4
- Pallai, Péter4
- Hanák, Péter3
- Samizdat Archives3
- Nóvé, Béla2
- Balkan Section1
- Balogh, Eva S.1
- British Broadcasting Corporation, Written Archive Centre1
- Communist International (Comintern)1
- Great Britain, Foreign and Commonwealth Office1
- Hegedüs, András1
- Magos-Gimes, Judith1
- Miklós Hollós1
- Open Society Archives at Central European University1
- Privát Fotó és Film Alapítvány1
- Péter Forgács1
- Romanian Unit1
- Samizdat Archives of Radio Free Europe1