- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)67
- Samizdat Archives22
- Samizdat Archives of Radio Free Europe10
- Open Media Research Institute8
- Open Society Archives at Central European University7
- Aizenberg, Alexander3
- Radio Free Europe and Radio Liberty, Inc.3
- Radio Free Europe/Radio Liberty, Inc - Research Institute3
- Soviet Red Archives3
- Bortstieber, Gertrud2
- Geréb, Anna2
- Kryvenko, Anna2
- Alfred A. Reisch1
- Analytic Research Department1
- Betke, Ingo1
- Colloquia Jerzy Skowronek dedicata1
- Communist International (Comintern)1
- Csákó, Mihály1
- Drygas, Maciej1
- Gershtein, A.1