Estates and Autographs → Search Author / Collaborator = "Ritschl, Otto" and Collection = Estates and Autographs 1
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1
Brief von Otto Ritschl an Hans Vaihinger, 11.06.1915
Bonn, 11.06.1915Brief von Otto Ritschl an Hans Vaihinger, 16.04.1925
Bonn, 16.04.1925Brief von Otto Ritschl an Hans Vaihinger, 16.05.1911
Bonn, 16.05.1911