OOn what there isOn what there isde A. J. AyerMateriasKnowledge, Theory ofTruthTheory of KnowledgeEdiciones (1)On what there is (1969)Israel Academy of Sciences and Humanities · inglésMás obras de A. J. AyerAAyer: Writings on PhilosophyAyer: Writings on PhilosophyBBritish empirical philosophyBritish empirical philosophyTThe humanist outlookThe humanist outlook
