- United States. Congress. House. Committee on Un-American Activities3
- Zagoria, Donald S.3
- Aron, Raymond2
- Berdiaev, Nikolai2
- Bieńkowski, Władysław2
- Carr, Edward Hallett2
- Carrillo, Santiago2
- Chamberlin, William Henry2
- Cohn-Bendit, Daniel2
- Communist International2
- Dallin, David J.2
- Daniels, Robert V.2
- Delaney, Robert Finley2
- Duclos, Jacques2
- Eastman, Max2
- Fedoseev, Anatolii Pavlovich2
- Fehér, Ferenc2
- Foster, William Z.2
- Geller, Mikhail2
- Guillain, Robert2