edited by Joachim-Michael Engel, Udo Flesch, and Günter Stüttgen, with contributions by J.R. Barker ... [et al.] ; translated by Marguerite A. Biederman-ThorsonVCHc1985
by Günter Stüttgen and Udo Flesch ; with a contribution by Edouard Grosshans and Michel Gautherie ; translated by Marguerite A. Biederman-ThorsonVCH Verlagsgesellschaftc1985