- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)5,238
- Radio Free Europe/Radio Liberty, Inc - Research Institute2
- British Broadcasting Corporation, Written Archive Centre1
- Drygas, Maciej1
- Entrop, Bob1
- Fekete Doboz Alapítvány1
- Free Europe Committee, Inc1
- International Helsinki Federation for Human Rights1
- Nowakowski, Tadeusz1
- Open Media Research Institute1
- Pallai, Péter1
- Pilis, Mariusz1
- Polish Unit of RFE/RL Research Institute; RFE/RL RI1
- Szulkin, Piotr1
- Świderski, Bartłomiej1