- Bortstieber, Gertrud5
- Samizdat Archives3
- Geréb, Anna2
- Hanák, Péter2
- Radio Free Europe/Radio Liberty, Inc - Research Institute2
- Aleksandrov, Grigori1
- Braun, Vladimir1
- Communist International (Comintern)1
- Donskoy, Mark1
- Hegedüs, András1
- Mochulʹskii, Konstantin Vasilʹevich1
- Open Society Archives at Central European University1
- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)1
- Razumnyi, Alexander1
- Romanian Unit1
- Samizdat Archives of Radio Free Europe1
- Yutkevich, Sergei1