- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)21,346
- Radio Free Europe/Radio Liberty, Inc - Research Institute12
- Soviet Red Archives5
- Bortstieber, Gertrud4
- Pallai, Péter4
- Hanák, Péter3
- Liu, Shaoqi3
- Samizdat Archives3
- Seton-Watson, Hugh3
- Balogh, Eva S.2
- Biberman, Herbert J.2
- Carr, Edward Hallett2
- Crossman, R. H. S.2
- Fischer, George2
- Halecki, Oskar2
- Henderson, H. W.2
- Kolarz, Walter2
- Maclean, Fitzroy2
- Mao, Zedong2
- Moore, Barrington2