- Radio Free Europe/Radio Liberty, Inc - Research Institute13
- Soviet Red Archives6
- Samizdat Archives5
- Bortstieber, Gertrud4
- Pallai, Péter4
- Csákó, Mihály3
- Hanák, Péter3
- Balogh, Eva S.2
- Nóvé, Béla2
- Open Media Research Institute2
- Open Society Archives at Central European University2
- Alfred A. Reisch1
- Analytic Research Department1
- Balkan Section1
- British Broadcasting Corporation, Written Archive Centre1
- Bulgarian Unit1
- Constitutional and Legal Policy Institute at OSI-Budapest1
- Czechoslovak Unit1
- Fic, Victor M.1
- Filerman, Gary1