by Elster, Ludwig [edt] | Wieser, Friedrich [edt] | Weber, Adolf [edt] | Германия.
by Elster, Ludwig [edt] | Wieser, Friedrich [edt] | Weber, Adolf [edt] | Германия | СССР.
by Elster, Ludwig [edt] | Wieser, Friedrich [edt] | Weber, Adolf [edt] | Гемания.