- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)5,452
- Héderváry, Claire de31
- Conquest, Robert6
- Samizdat Archives5
- Grimsted, Patricia Kennedy3
- Institut zur Erforschung der UdSSR3
- Marples, David R.3
- Monitoring Unit3
- Scott, Harriet Fast3
- Soviet Red Archives3
- Alekseeva, Liudmila2
- Bourdeaux, Michael2
- Freeman, Joseph2
- Lane, David Stuart2
- Nove, Alec2
- Open Society Archives at Central European University2
- Radio Free Europe/Radio Liberty, Inc - Research Institute2
- Samizdat Archives of Radio Free Europe2
- Adamec, Ludwig W.1
- Agentstvo pechati "Novosti"1