- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)50,178
- Radio Free Europe/Radio Liberty, Inc - Research Institute12
- Bortstieber, Gertrud8
- Nóvé, Béla7
- Rákosi, Mátyás7
- Hanák, Péter5
- Soviet Red Archives5
- Zsigmond, László5
- Mao, Zedong4
- Pallai, Péter4
- Stalin, Joseph4
- Munk, Andrzej3
- Samizdat Archives3
- Aczél, Tamás2
- Aldanov, Mark Aleksandrovich2
- Aron, Raymond2
- Balogh, Eva S.2
- Biberman, Herbert J.2
- Carr, Edward Hallett2
- Cséry, László2