- International Congress of Logic, Methodology and Philosophy of Science (3)
- Suppes, Patrick, 1922- (2)
- Academia Republicii Socialiste România (1)
- Cohen, L. Jonathan (Laurence Jonathan) (1)
- International Union of the History and Philosophy of Science. Division of Logic, Methodology and Philosophy of Science (1)
- Nagel, Ernest, 1901- (1)
- Tarski, Alfred, 1902- (1)