- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)4,302
- Radio Free Europe/Radio Liberty, Inc - Research Institute12
- Soviet Red Archives5
- Bortstieber, Gertrud4
- Pallai, Péter4
- Hanák, Péter3
- Samizdat Archives3
- Balogh, Eva S.2
- Biberman, Herbert J.2
- Nóvé, Béla2
- Open Media Research Institute2
- Sheen, Fulton J.2
- Alexeev, Vasilii Ivanovich1
- Alfred A. Reisch1
- Almond, Gabriel A.1
- Analytic Research Department1
- Aron, Raymond1
- Balkan Section1
- Berdiaev, Nikolai1
- Bergson, Abram1