- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)995
- Radio Free Europe/Radio Liberty, Inc - Research Institute20
- Soviet Red Archives8
- Samizdat Archives7
- Csákó, Mihály6
- Pallai, Péter4
- Drachkovitch, Milorad M.3
- Hanák, Péter3
- Balogh, Eva S.2
- Bíró, András2
- Gábor Magos2
- Nóvé, Béla2
- Open Media Research Institute2
- Open Society Archives at Central European University2
- Samizdat Archives of Radio Free Europe2
- Abel, Elie1
- Alfred A. Reisch1
- Alisjahbana, S. Takdir1
- Analytic Research Department1
- Aptheker, Herbert1