- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)63
- Fekete Doboz Alapítvány2
- Pallai, Péter2
- Radio Free Europe/Radio Liberty, Inc - Research Institute2
- Barański, Marek1
- British Broadcasting Corporation, Written Archive Centre1
- Broniewski, Stanisław1
- Drygas, Maciej1
- Free Europe Committee, Inc1
- Habielski, Rafał1
- Machcewicz, Paweł1
- Monitoring Unit1
- Open Media Research Institute1
- Rozgłośnia Polska Radia Wolna Europa1
- Samizdat Archives1
- Samizdat Archives of Radio Free Europe1
- Szulkin, Piotr1