- Open Media Research Institute18
- Radio Free Europe/Radio Liberty, Inc - Research Institute16
- Open Society Archives at Central European University12
- Soviet Red Archives8
- Monitoring Unit7
- Samizdat Archives5
- Samizdat Archives of Radio Free Europe5
- Philipp, Tibor3
- Group Inconnu2
- American Refugee Committee1
- BBC1
- Bartók, István1
- Bozóki, András1
- British Broadcasting Corporation, Written Archive Centre1
- Hegedüs, András1
- Jakab, Lajos1
- Pallai, Péter1
- Pastor, Peter1
- Radio Free Europe1
- Radio Free Europe and Radio Liberty, Inc.1