File:Prof. Dr. Hermann Kortum (1836-1904).jpg
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![File:Prof. Dr. Hermann Kortum (1836-1904).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/7/75/Prof._Dr._Hermann_Kortum_%281836-1904%29.jpg/530px-Prof._Dr._Hermann_Kortum_%281836-1904%29.jpg?20120518164803)
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