- Bortstieber, Gertrud8
- Hanák, Péter3
- Nóvé, Béla2
- Radio Free Europe/Radio Liberty, Inc - Research Institute2
- Samizdat Archives2
- Aroneanu, Eugène1
- Balkan Section1
- Binkley, Wilfred E.1
- Communist International (Comintern)1
- Galin, Boris1
- Hegedüs, András1
- Kautsky, Karl1
- Lieb, Fritz1
- Magos-Gimes, Judit1
- Open Society Archives at Central European University1
- Reves, Emery1
- Romanian Unit1
- Samizdat Archives of Radio Free Europe1
- Volin, B. M.1