Author: Robert G. Behrens, Michael Bickel, Rolf Engleman Jr., Jean Fuger, Lawrence E. Grimes, Basil Kanellakopulos, Daniel J. Lam, Kurt Roessler, Boyd W. Veal (auth.), Rudolf Keim, Cornelius Keller (eds.)
Author: Vera Haase, Hannelore Keller-Rudek, Livio Manes, Brigitte Schulz, Gustav Schumacher, Dieter Vollath, Heinz Zimmermann (auth.), Dr. Rudolf Keim (eds.)