- Bortstieber, Gertrud8
- Radio Free Europe/Radio Liberty, Inc - Research Institute5
- Hanák, Péter3
- Kautsky, Karl2
- Nóvé, Béla2
- Samizdat Archives2
- Aroneanu, Eugène1
- Balkan Section1
- Binkley, Wilfred E.1
- Buber-Neumann, Margarete1
- Bulgarian Unit1
- Communist International (Comintern)1
- Curtius, Ernst Robert1
- Fischer, Kurt J.1
- Free Europe Committee, Inc1
- Galin, Boris1
- Hegedüs, András1
- Heimbürger, Boris1
- Kogon, Eugen1
- Kündig-Steiner, Werner1