- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)451
- Héderváry, Claire de18
- Samizdat Archives11
- Open Society Archives at Central European University8
- Open Media Research Institute7
- Samizdat Archives of Radio Free Europe7
- Soviet Red Archives6
- Monitoring Unit4
- Bortstieber, Gertrud3
- Grigor, Murray3
- Radio Free Europe/Radio Liberty, Inc - Research Institute3
- Berdiaev, Nikolai2
- Chamberlin, William Henry2
- Figes, Orlando2
- Grant, Steven A.2
- Miliukov, P. N.2
- Pipes, Richard2
- Radio Free Europe and Radio Liberty, Inc.2
- Raeff, Marc2
- Shub, Anatole2