- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)99
- Radio Free Europe/Radio Liberty, Inc - Research Institute8
- Soviet Red Archives7
- Bortstieber, Gertrud5
- Samizdat Archives5
- Skvortsov-Stepanov, Ivan Ivanovich3
- Geréb, Anna2
- Hanák, Péter2
- Ivchenko, Viktor2
- Kalatozov, Mikhail2
- Open Society Archives at Central European University2
- Radio Free Europe and Radio Liberty, Inc.2
- Achminow, Herman F.1
- Adamovich, Georgii1
- Agar, Herbert1
- Alekseev, Nikolai Nikolaevich1
- Alfred A. Reisch1
- Analytic Research Department1
- Andreev, Ivan Dmitrievich1
- Arbatsky, Yury1