- Binkley, Wilfred E.1
- Bocheński, Aleksander1
- Braun, Vladimir1
- British Broadcasting Corporation, Written Archive Centre1
- Bujnowski, Józef1
- Bulla, Béla1
- Bullitt, William C.1
- Carr, Edward Hallett1
- Communist International (Comintern)1
- Davis, Kenneth S.1
- Donskoy, Mark1
- Fischer, Louis1
- Fodor, Lajos1
- Friedman, Philip1
- Galin, Boris1
- Giertych, Jędrzej1
- Great Britain, Foreign and Commonwealth Office1
- Hegedüs, András1
- Józan, László1
- Kautsky, Karl1