- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)1,043
- Radio Free Europe/Radio Liberty, Inc - Research Institute20
- Soviet Red Archives8
- Csákó, Mihály7
- Samizdat Archives7
- Pallai, Péter4
- Hanák, Péter3
- Balogh, Eva S.2
- Bíró, András2
- Conquest, Robert2
- Deutscher, Isaac2
- Ginzburg, Evgeniia Semenovna2
- Gábor Magos2
- Nóvé, Béla2
- Open Media Research Institute2
- Open Society Archives at Central European University2
- Samizdat Archives of Radio Free Europe2
- Acton, H. B.1
- Alfred A. Reisch1
- Allilueva, Svetlana1