- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)52
- 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
- Open Society Archives at Central European University2
- Radio Free Europe and Radio Liberty, Inc.2
- Alfred A. Reisch1
- Analytic Research Department1
- Andreev, Ivan Dmitrievich1
- Arsenʹev, Nikolai Sergeevich1
- Azizbekova, P. A.1
- Babushkin, Aleksei Nikitich1
- Bogolepov, Aleksandr A.1
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- Chagin, Boris Aleksandrovich1