Recent developments in mathematical physics : proceedings of the XII. International Universit/UMatswochen f/UMur Kernphysik 1973 der Karl-Franzens-Universit/UMat Graz at Schladming (Stelermark, Austria), 5th February 17th February 1973 / Edited by Paul Urban. Internationale Universit/UMatswochen F/UMur Kernphysik Der Karl-Franzens-Universit/UMat Graz (12th :, 1973 : Schladming, Austria) Urban, Paul Oskar, 1905- Austria. Bundesministerius f/UMur Wissenschaft und Forschung. Mathematical physics. QC20.5 I57 530.15 GRR Sponsored by Bundesministerius f/UMur Wissenschaft und Forschung and others. Includes bibliographical references. Wien ; New York : Springer-Verlag, c1973. c1973. 1973 Text vi, 610 p. : eng Acta physica Austriaca. Supplementus ; 11