by Jahn, Georg.
by Jahn, Georg | Bissing, Wilhelm Moritz Frhr. von.
by Lederer, Emil | Briefs, Goetz | Feiler, Arthur | Jahn, Georg | Mises, Ludwig.
by Lederer, Emil | Briefs, Goetz | Feiler, Arthur | Jahn, Georg | Mises, Ludwig | Wolfers, Arnold.