- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)35
- Radio Free Europe/Radio Liberty, Inc - Research Institute6
- American Refugee Committee3
- Cséry, László2
- Pallai, Péter2
- Pastor, Peter2
- Samizdat Archives2
- de Héderváry, Claire2
- Balogh, Eva S.1
- Bortstieber, Gertrud1
- British Broadcasting Corporation, Written Archive Centre1
- Bíró, András1
- Fekete Doboz Alapítvány1
- Great Britain, Foreign and Commonwealth Office1
- Hungarian Institute for Public Opinion Research1
- Héderváry, Claire de1
- International Helsinki Federation for Human Rights1
- International Monitor Institute1
- Király, Béla1
- Magos-Gimes, Judit1