Der chronische Nasen- und Rachen-Katarrh : eine klinische Studie / von Max. Bresgen.

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Der chronische Nasen- und Rachen-Katarrh : eine klinische Studie / von Max. Bresgen. Public Domain Mark. Source: Wellcome Collection.

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This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.