- Pallai, Péter2
- Radio Free Europe/Radio Liberty, Inc - Research Institute2
- Alfred A. Reisch1
- Benedykt, Stefan1
- British Broadcasting Corporation, Written Archive Centre1
- Czapski, Józef1
- Free Europe Committee, Inc1
- Gaulle, Charles de1
- Kot, Stanisław1
- Naglerowa, Herminia1
- Open Media Research Institute1
- Polish Unit of RFE/RL Research Institute; RFE/RL RI1
- Raczyński, Edward1
- Soviet Red Archives1
- Szygowski, Juliusz1
- Wierzyński, Kazimierz1