- Pallai, Péter2
- Radio Free Europe/Radio Liberty, Inc - Research Institute2
- Alfred A. Reisch1
- Badeni, Stefan1
- British Broadcasting Corporation, Written Archive Centre1
- Free Europe Committee, Inc1
- Giertych, Jędrzej1
- Haupt, Zygmunt1
- Jasienica, Paweł1
- Jedlicki, Witold1
- Kamiński, Aleksander1
- Konarski, Szymon1
- Korboński, Stefan1
- Lednicki, Wacław1
- Munk, Andrzej1
- Open Media Research Institute1
- Polish Unit of RFE/RL Research Institute; RFE/RL RI1
- Soviet Red Archives1
- Terts, Abram1
- Wittlin, Józef1