- Albat, Friedrich1
- Balogh, Eva S.1
- Bortstieber, Gertrud8
- Burnham, James1
- Communist International (Comintern)1
- Croce, Benedetto1
- Deésy, Alfréd1
- Ferris, Alexander James1
- Gordon, Manya1
- Great Britain, Foreign and Commonwealth Office1
- Hadamovsky, Eugen1
- Hegedüs, András1
- Hoden, Marcel1
- Kalatozov, Mikhail1
- Kemény, István1
- Magos-Gimes, Judith Juca1
- Miklós Hollós1
- Mikó, Imre1
- Nóvé, Béla6
- Open Society Archives at Central European University1