Carl du Prel an Vaihinger, Grasstein (Tirol), o. D. [nach 9.8.1888, vor 1892], 2 S., hs., Postkarte an Herrn Dr Hans Vaihinger | Professor der Philosophie | in Halle a. S., Poststempel POSTCONDUCTEUR IM ZUGE | BREGENZ–INNSBRUCK No 318, Staats- und Universitätsbibliothek Bremen, Aut. XXI, 6 p, Nr. 17
Grasstein (Tirol), 9.8.1888 - 1892





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