- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)7,137
- Héderváry, Claire de31
- Conquest, Robert6
- Samizdat Archives6
- Institut zur Erforschung der UdSSR4
- Monitoring Unit4
- Grimsted, Patricia Kennedy3
- Marples, David R.3
- Radio Free Europe and Radio Liberty, Inc.3
- Scott, Harriet Fast3
- Soviet Red Archives3
- Alekseeva, Liudmila2
- Bourdeaux, Michael2
- Freeman, Joseph2
- Karatay, Neşe2
- Krivitsky, W. G.2
- Lane, David Stuart2
- Nove, Alec2
- Open Society Archives at Central European University2
- Radio Free Europe/Radio Liberty, Inc - Research Institute2