- Great Britain, Foreign and Commonwealth Office1
- Gunther, John1
- Hegedüs, András1
- Henderson, Nevile1
- Hippler, Fritz1
- Ivens, Joris1
- Joyce, William1
- József, Banass1
- Kemény, István1
- Magos-Gimes, Judit1
- Miklós Hollós1
- Open Society Archives at Central European University1
- Pierson, Arthur Tappan1
- Protazanov, Yakov1
- Radio Free Europe/Radio Liberty, Inc - Research Institute1
- Samizdat Archives of Radio Free Europe1
- Selver, Paul1
- Stan, Radu1
- Szabó, Miklós1
- Varga, László1