- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)101
- Radio Free Europe and Radio Liberty, Inc.3
- Radio Free Europe/Radio Liberty, Inc - Research Institute2
- Samizdat Archives2
- Aleksandrov, Evgeny1
- Alexeev, Vasilii Ivanovich1
- Goba, Kaspars1
- Grazhdan, Valerii Dmitrievich1
- Institut istorii (Akademiia nauk SSSR). Leningradskoe otdelenie1
- International Workingmen's Association1
- Kopelev, Lev1
- Kvedaravičius, Mantas1
- Michnik, Adam1
- Minsk (Belarus). Institut historyi partyi1
- Mitta, Evgeniy1
- Moscow. Institut marksizma-leninizma1
- Moskalenko, Aleksei Trofimovich1
- Open Society Archives at Central European University1
- Popov, V. P.1
- Protazanov, Yakov1