- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)137
- Soviet Red Archives3
- Kun, Miklós2
- Open Society Archives at Central European University2
- Radio Free Europe/Radio Liberty, Inc - Research Institute2
- Borisov, Boris1
- Bortstieber, Gertrud1
- Büchner, Christiane1
- Communist International (Comintern)1
- Communist International Congress1
- Donskoy, Mark1
- Dovzhenko, Alexander1
- Eborn, Anna1
- Geréb, Anna1
- Gislason, Tómas1
- Guy-Marc, Hinant1
- Halonen, Arto1
- Honcoop, Haruna1
- International Helsinki Federation for Human Rights1
- Kopczyński, Krzysztof1