- Chamberlin, William Henry2
- Freeman, Joseph2
- Trotsky, Leon2
- American Trade Union Delegation to the Soviet Union1
- Andreev, Vasilii1
- Atholl, Katharine Marjory Stewart-Murray1
- Campbell, Robert Wellington1
- Hoover, Calvin Bryce1
- Hubbard, Leonard E.1
- Jasny, Naum1
- Kieser, Georges1
- Pirogov, Peter1
- Prokopovich, S. N.1
- Reiman, Michal1
- Schwartz, Harry1
- Swianiewicz, Stanisław1
- Turin, Sergei Petrovich1
- Varga, Eugen1