- Bortstieber, Gertrud4
- Nóvé, Béla2
- Balogh, Eva S.1
- Communist International (Comintern)1
- Communist International. Congress1
- Hubbard, Leonard E.1
- Ludendorff, Erich1
- Magos-Gimes, Judit1
- Marx, Karl1
- Mehring, Franz1
- Privát Fotó és Film Alapítvány1
- Péter Forgács1
- Radio Free Europe/Radio Liberty, Inc - Research Institute1
- Salvemini, Gaetano1
- Samizdat Archives1
- Samizdat Archives of Radio Free Europe1
- Seldes, George1