- Bortstieber, Gertrud5
- Radio Free Europe/Radio Liberty, Inc - Research Institute5
- Samizdat Archives3
- Geréb, Anna2
- Hanák, Péter2
- Shmelev, I. S.2
- Aldanov, Mark Aleksandrovich1
- Aleksandrov, Grigori1
- Arsen'ev, Nikolai Sergeevich1
- Bucar, Annabelle1
- Chiaureli, Mikhail1
- Communist International (Comintern)1
- Hegedüs, András1
- Heimbürger, Boris1
- Ivanov, Aleksandr1
- Mayakovsky, Vladimir1
- Open Society Archives at Central European University1
- Petrov, Vladimir1
- Pyriev, Ivan1
- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)1