- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)6
- Nóvé, Béla3
- Csákó, Mihály2
- Bulgarian Unit1
- Bíró, András1
- Choffat, Frédéric1
- Costes, Paul1
- Czechoslovak Unit1
- Eltchaninoff, Michel1
- Hanák, Péter1
- Lanzmann, Claude1
- Open Society Archives at Central European University1
- Ophüls, Marcel1
- Pas, Klaus1
- Polish Unit of RFE/RL Research Institute; RFE/RL RI1
- Samizdat Archives1
- Soros Foundation–Hungary1
- Witness, Inc.1