- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)10,444
- Bortstieber, Gertrud8
- Radio Free Europe/Radio Liberty, Inc - Research Institute8
- Soviet Red Archives5
- Hanák, Péter3
- Nóvé, Béla2
- Open Media Research Institute2
- Samizdat Archives2
- Alfred A. Reisch1
- Analytic Research Department1
- Assmann, Kurt1
- Balkan Section1
- Balogh, Eva S.1
- Bennett, Lowell1
- Boissier, Pierre1
- Bonn. Conference1
- Bulgarian Unit1
- Bähr, Walter1
- Communist International (Comintern)1
- Czechoslovak Unit1