Elementary particle theories. Proceedings of the 5. internat. Univ. Wochen f. Kernphysik 1966 der Karl-Franzens-Univ. Graz, at Schladming <Steiermark, Austria> 24th Feb. - 9th March 1966. - Urban, Paul (Acta physica austiaca. Suppl. 3., 1966)