- Radio Free Europe/Radio Liberty, Inc - Research Institute12
- Samizdat Archives7
- Soviet Red Archives7
- Hanák, Péter3
- Samizdat Archives of Radio Free Europe3
- Bahro, Rudolf2
- Nóvé, Béla2
- Open Media Research Institute2
- Alfred A. Reisch1
- Analytic Research Department1
- Aron, Raymond1
- Balkan Section1
- Balogh, Eva S.1
- Berdiaev, Nikolai1
- Boelcke, Willi A.1
- Borbándi, Gyula1
- Brux, Arnim1
- Buber-Neumann, Margarete1
- Buchbender, Ortwin1
- Bulgarian Unit1