- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)128
- Radio Free Europe/Radio Liberty, Inc - Research Institute8
- Soviet Red Archives7
- Bortstieber, Gertrud5
- Samizdat Archives5
- Aldanov, Mark Aleksandrovich3
- Romm, Mikhail3
- Skvortsov-Stepanov, Ivan Ivanovich3
- Agar, Herbert2
- Erenburg, Ilʹia2
- Geréb, Anna2
- Hanák, Péter2
- Ivchenko, Viktor2
- Kalatozov, Mikhail2
- Open Society Archives at Central European University2
- Prokof'ev, Vasilii Ivanovich2
- Radio Free Europe and Radio Liberty, Inc.2
- Achminow, Herman F.1
- Adamovich, Georgii1
- Adams, James Truslow1