- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)2,829
- Héderváry, Claire de28
- Radio Free Europe/Radio Liberty, Inc - Research Institute7
- Schapiro, Leonard Bertram3
- Fekete Doboz Alapítvány2
- Kommunisticheskaia partiia Sovetskogo Soiuza2
- Soviet Red Archives2
- Adams, T. W.1
- Alexander, Robert J.1
- Almond, Gabriel A.1
- Avtorkhanov, Abdurakhman1
- Balkan Section1
- Barnett, A. Doak1
- Blackmer, Donald L. M.1
- Blajer, Anton1
- Bortstieber, Gertrud1
- Brooks, Jeffrey1
- Bukharin, Nikolai Ivanovich1
- Bulgarian Unit1
- Bíró, András1