There is all but one recorded visit by Zubiri to Princeton, on October 2nd 1946, when he lectured in French on "The real and mathematics-A philosophical problem" ("Le reel et les mathematiques--Un probleme de philosophie").
There is all but one recorded visit by Zubiri to the United States, specifically Princeton University, on October 2nd 1946. In Princeton Zubiri lectured in French on "The real and mathematics-A philosophical problem" ("Le reel et les mathematiques--Un probleme de philosophie").