- Pallai, Péter2
- Radio Free Europe/Radio Liberty, Inc - Research Institute2
- Alfred A. Reisch1
- Amalʹrik, Andrei1
- Bieńkowski, Władysław1
- British Broadcasting Corporation, Written Archive Centre1
- Burba-Kochański, O. N.1
- Chojnacki, Władysław1
- Czapska, Maria1
- Free Europe Committee, Inc1
- Gielo, Józef1
- Gombrowicz, Witold1
- International Helsinki Federation for Human Rights1
- Kondratiuk, Andrzej1
- Mieroszewski, Juliusz1
- Open Media Research Institute1
- Piwowski, Marek1
- Polish Unit of RFE/RL Research Institute; RFE/RL RI1
- Rostworowski, Jan1
- Sakowski, Juliusz1