- Kautsky, Karl2
- Bukharin, Nikolaĭ1
- Burnham, James1
- Chamberlin, William Henry1
- Communist International. Congress1
- David, F.1
- Eastman, Max1
- Gray, Alexander1
- International Conference of the Executive Committees of Three International Organizations1
- Krejcsi, Rezső,1
- Löwenthal, Richard1
- Shaplen, Joseph1
- Varga, Eugen1
- Wilde, Oscar1