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Ueber die Auscultation der normalen Herztöne : Inaugural-Dissertation der medicinischen Facultät zu Giessen zur Erlangung der Doctorwürde in der Medicin, Chirurgie und Geburtshülfe / vorgelegt von Martin Schäfer ; Präses Herr Prof. Dr. Seitz. 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.