- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)1,770
- Samizdat Archives24
- Samizdat Archives of Radio Free Europe10
- Soviet Red Archives9
- Radio Free Europe/Radio Liberty, Inc - Research Institute8
- Open Media Research Institute6
- Monitoring Unit5
- Radio Free Europe and Radio Liberty, Inc.3
- Bukharin, Nikolai Ivanovich2
- Fedotov, G. P.2
- Geller, Mikhail2
- Geréb, Anna2
- Gumilev, N.2
- Hanák, Péter2
- Open Society Archives at Central European University2
- Ozerov, Yurii2
- Waliszewski, Kazimierz2
- Zemtsov, Ilya2
- Zinoviev, Aleksandr2
- Agraniants, Oleg1