- Communist International. Congress1
- Dieterlen, H.1
- Dzigan, Efim1
- Hubbard, Leonard E.1
- Ludendorff, Erich1
- Marx, Karl1
- Medvedkin, Alexander1
- Mehring, Franz1
- Romm, Mikhail1
- Room, Abram1
- Rosenberg, Artur1
- Russinow, Andrei1
- Rutherford, J. F.1
- Salvemini, Gaetano1
- Seldes, George1
- Voegeli, Adolf1