Current problems in elementary particle and mathematical physics : proceedings of the XV. Internationale Universitätswochen für Kernphysik 1976 der Karl-Franzens-Universität Graz at Schladming (Steiermark, Austria), 16th February-27th February 1976 / edited by Paul Urban ; sponsored by Bundesministerium fur Wissenschaft und Forschung ... [et al.]. (Acta physica Austriaca : Supplementum ; 15)
Current problems in elementary particle and mathematical physics : proceedings of the XV. Internationale Universitätswochen für Kernphysik 1976 der Karl-Franzens-Universität Graz at Schladming (Steiermark, Austria), 16th February-27th February 1976 / edited by Paul Urban ; sponsored by Bundesministerium fur Wissenschaft und Forschung ... [et al.].