- Radio Free Europe/Radio Liberty, Inc - Research Institute11
- Samizdat Archives6
- Soviet Red Archives6
- Hanák, Péter3
- Bortstieber, Gertrud2
- Kluge, Alexander2
- Nóvé, Béla2
- Open Media Research Institute2
- Petrowsky, A.2
- Samizdat Archives of Radio Free Europe2
- Specovius, Günther2
- Weber, Hermann2
- Alfred A. Reisch1
- Analytic Research Department1
- Anders, Karl1
- Balkan Section1
- Balogh, Eva S.1
- Borresholm, Boris von1
- Bulgarian Unit1
- Chugunov, T. K.1