- International Congress of Philosophy (3)
- Newman, Paul, 1924- (3)
- Schlomann, Alfred, 1878- (3)
- Dorian, A. F. (Angelo Francis), 1908- (2)
- Alexandratos, Spiro (1)
- Bonet, Llorenç (1)
- Boshart, August (1)
- Clason, W. E., 1898- (1)
- Guillaume, Jean, 1932- (1)
- Institut Internationa du Froidü (1)
- Nikolaidis, Anastasios G. (1)
- Ross, Colin (1)
- Stulpnagel, Paul (1)
- Venator, Wilhelm (1)