- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)2,323
- Radio Free Europe/Radio Liberty, Inc - Research Institute9
- Bortstieber, Gertrud8
- Héderváry, Claire de8
- Soviet Red Archives6
- Samizdat Archives4
- Hanák, Péter3
- Dörries, Bernhard2
- Institut zur Erforschung der UdSSR2
- Koch, Hans2
- Nóvé, Béla2
- Open Media Research Institute2
- Pohle, Heinz2
- Alfred A. Reisch1
- Analytic Research Department1
- Bahr, Ernst1
- Balkan Section1
- Balogh, Eva S.1
- Baranskii, N. N.1
- Berlin, Isaiah1