- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)7,381
- Héderváry, Claire de87
- Open Society Archives at Central European University14
- Radio Free Europe/Radio Liberty, Inc - Research Institute8
- Schapiro, Leonard Bertram3
- Soviet Red Archives3
- Staar, Richard Felix3
- Tang, Peter S. H.3
- United States. Congress. House. Committee on Un-American Activities3
- Wolfe, Bertram David3
- Barnett, A. Doak2
- Brown, James F.2
- Columbia University School of International Affairs2
- Communist International. Congress2
- Fekete Doboz Alapítvány2
- Foster, William Z.2
- Henderson, H. W.2
- Joy, C. Turner2
- Kommunisticheskaia partiia Sovetskogo Soiuza2
- Kotkin, Stephen2