524,475 PROCEEDINGS Proceedings of the XVth World Congress of Philosophy. 17th to 22nd September 1973 Varna, Bulgaria. Sofia 1974 Press Production Centre 8 [K. tyt. oraz tekst w jęz. ros., franc., niem.] [Vol.] 4. Man and his personal freedom. Responsibility and creativity in art and literature. Problems of determinism. The future of philosophy, s. 485, nlb. 2.