- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)3,667
- Radio Free Europe/Radio Liberty, Inc - Research Institute20
- Samizdat Archives20
- Csákó, Mihály15
- Đorđević, Aleksandar13
- Soviet Red Archives10
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- Visnews8
- UPTIN7
- Samizdat Archives of Radio Free Europe6
- Open Media Research Institute5
- Tsentralnaia Studiia Dokumentalnykh Filmov (TsSDF)5
- Pallai, Péter4
- Ukrainskaia Studiia Khronikalno-dokumentalnykh Filmov4
- Ajtony, Árpád3
- Hanák, Péter3
- Hungarian Ministry of the Interior3
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- Radio Free Europe and Radio Liberty, Inc.3
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