- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)6
- Bortstieber, Gertrud4
- Nóvé, Béla3
- Péter Forgács2
- Balogh, Eva S.1
- Bernstein, Eduard1
- Brzozowski, Stanisław1
- Communist International (Comintern)1
- Hurley, Frank1
- Ivens, Joris1
- Kautsky, Karl1
- Krejcsi, Rezső,1
- Ludendorff, Erich1
- Machin, Alfred1
- Privát Fotó és Film Alapítvány1
- Radio Free Europe/Radio Liberty, Inc - Research Institute1
- Rühlmann, Paul1
- Samizdat Archives1
- Samizdat Archives of Radio Free Europe1
- Stan, Radu1