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Credit
Die Mineralquellen von Neuenahr, verglichen mit denen von Carlsbad, Vichy und Ems : Mit einem Anhang über den Kurgebrauch und die Diät bei alkalischen Wassern. Public Domain Mark. Source: Wellcome Collection.
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This material has been provided by the Gerstein Science Information Centre at the University of Toronto, through the Medical Heritage Library. The original may be consulted at the Gerstein Science Information Centre, University of Toronto.