- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)12,784
- Radio Free Europe/Radio Liberty, Inc - Research Institute5
- Samizdat Archives5
- Samizdat Archives of Radio Free Europe4
- Soviet Red Archives3
- Hanák, Péter2
- Nóvé, Béla2
- Vajda, Júlia2
- Alfred A. Reisch1
- Analytic Research Department1
- Balkan Section1
- Balogh, Eva S.1
- Bolbrinker, Niels1
- Bortstieber, Gertrud1
- Bulgarian Unit1
- Communist International (Comintern)1
- Csákó, Mihály1
- Czechoslovak Unit1
- Domanig, Stephanus1
- Fekete Doboz Alapítvány1