File:Museum-der-Göttinger-Chemie Portrait-Otto-Wallach-1925 Lena-Hoppe-2018.png
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![File:Museum-der-Göttinger-Chemie Portrait-Otto-Wallach-1925 Lena-Hoppe-2018.png](https://upload.wikimedia.org/wikipedia/commons/thumb/0/06/Museum-der-G%C3%B6ttinger-Chemie_Portrait-Otto-Wallach-1925_Lena-Hoppe-2018.png/800px-Museum-der-G%C3%B6ttinger-Chemie_Portrait-Otto-Wallach-1925_Lena-Hoppe-2018.png?20231208171602)
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