- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)1,187
- Pallai, Péter2
- Radio Free Europe/Radio Liberty, Inc - Research Institute2
- Alfred A. Reisch1
- Beck, Józef1
- Bieńkowska, Danuta1
- Biskupski, Stefan1
- British Broadcasting Corporation, Written Archive Centre1
- Free Europe Committee, Inc1
- Główna Komisja Badania Zbrodni Hitlerowskich w Polsce1
- Hoffman, Jerzy1
- Kot, Stanisław1
- Munk, Andrzej1
- Open Media Research Institute1
- Pankowski, Marian1
- Polish Unit of RFE/RL Research Institute; RFE/RL RI1
- Skórzewski, Edward1
- Soviet Red Archives1
- Wasiutyński, Wojciech1
- Witos, Wincenty1