- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)2,689
- Radio Free Europe/Radio Liberty, Inc - Research Institute20
- Samizdat Archives12
- Soviet Red Archives9
- Conquest, Robert7
- Csákó, Mihály7
- Pallai, Péter4
- Hanák, Péter3
- Samizdat Archives of Radio Free Europe3
- Balogh, Eva S.2
- Bíró, András2
- Conference on the Russian Revolution2
- Ello, Paul2
- Fic, Victor M.2
- Gábor Magos2
- Horecky, Paul Louis2
- Kołakowski, Leszek2
- Laqueur, Walter2
- Lewin, Moshe2
- Nove, Alec2