- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)347
- Pallai, Péter2
- Radio Free Europe/Radio Liberty, Inc - Research Institute2
- British Broadcasting Corporation, Written Archive Centre1
- Dąbrowski, Roman1
- Felsztyn, Tadeusz1
- Free Europe Committee, Inc1
- Komorowski, Tadeusz1
- Matuszewski, Ignacy1
- Munk, Andrzej1
- Open Media Research Institute1
- Polish Unit of RFE/RL Research Institute; RFE/RL RI1
- Płażewski, Jerzy1
- Sokolnicki, Michał1