by Briefs, Goetz | Schwenger, Rudolf.
by Briefs, Goetz | Geck, L. H. Adolf.
by Briefs, Goetz | B�aumer, Peter C.
by Lederer, Emil | Briefs, Goetz | Feiler, Arthur | Jahn, Georg | Mises, Ludwig.
by Lederer, Emil | Briefs, Goetz | Feiler, Arthur | Jahn, Georg | Mises, Ludwig | Wolfers, Arnold.