Author: O. Stocker (auth.), Dr. M. J. Adriani, Docent Dr. H. C. Aslyng, Professor Dr. Hans Burström, Dr. Rudolf Geiger, Dr. Fritz Gessner, Univ.-Professor Dr. Otto Härtel, Dr. Bruno Huber, Dr. Magdalena Hülsbruch, Professor Dr. rer. nat. Kurt Kalle, Dr. H. Kern, Dr. Ch. Killian, o. Hochschul-Professor Dr. Josef G. Kisser, Dr. Paul J. Kramer, Dr. Georges Lemée, Dr. J. Levitt, Dr. Bernard S. Meyer, Professor Dr. Kurt Mothes, Dr. Arthur Pisek, Professor Dr. Franz Ruttner, Dr. M. G. Stålfelt, Dr. Walter Stiles, Dr. Otto Stocker, Dr. C. Ralph Stocking, Dozent Dr. Herbert Straka, Professor Dr. W. C. Thornthwaite, Professor Dr. phil. Carl Troll, Dr. phil. Hermann Ullrich, Dr. F. J. Veihmeyer (eds.)