- Héderváry, Claire de3,222
- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)2,351
- Columbia University School of International Affairs358
- Radio Free Europe/Radio Liberty, Inc - Research Institute14
- Nóvé, Béla11
- Bortstieber, Gertrud8
- Soviet Red Archives7
- Csákó, Mihály5
- Gábor Magos5
- Samizdat Archives5
- Institut zur Erforschung der UdSSR4
- Judith Gimes4
- Mosnauchfilm4
- Pallai, Péter4
- Szabó, Miklós4
- Djilas, Milovan3
- Hanák, Péter3
- Skvortsov-Stepanov, Ivan Ivanovich3
- Varga, László3
- Balogh, Eva S.2