Symposium on Meson-, Photo-, and Electroproduction at Low and Intermediate Energies Bonn, September 21–26, 1970 Gerhard Höhler and Atsushi Fujimori and Johann Kühn and Thomas Müller and Frank Steiner and William C. Stwalley and Joachim E. Trümper and Peter Wölfle and Ulrike Woggon