- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)2,991
- Open Society Archives at Central European University20
- Héderváry, Claire de16
- Capra, Frank7
- Hazan, Barukh2
- Kater, Michael H.2
- Waggner, George2
- Anstey, Edgar1
- Barghoorn, Frederick Charles1
- Barker, Greg1
- Barnes, James Strachey1
- Bauer, Christian1
- Bogart, Leo1
- Bosworth, R. J. B.1
- Braun, Emily1
- Brendon, Piers1
- Brown, James F.1
- Browne, Donald R.1
- Chapman, James1
- Charbol, Claude1