- Bortstieber, Gertrud8
- Radio Free Europe/Radio Liberty, Inc - Research Institute6
- Hanák, Péter3
- Nóvé, Béla2
- Samizdat Archives2
- Balkan Section1
- Bulgarian Unit1
- Communist International (Comintern)1
- Free Europe Committee, Inc1
- Friedrich, Gerd1
- Goldstein, Bernard1
- Hegedüs, András1
- Lipper, Elinor1
- Magos-Gimes, Judit1
- Open Society Archives at Central European University1
- Rajk, László1
- Romanian Unit1
- Samizdat Archives of Radio Free Europe1
- Stadtmüller, Georg1
- Taylor, Telford1