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Credit
Einiges über die Speichel-Secretion : Inauguraldissertation zur Erlangung der Doctorwürde in der Medicin, Chirurgie und Geburtshülfe vorgelegt der hohen medicinischen Facultät der Universität Zürich den 18. September 1850 / durch Hans Conrad Rahn. Public Domain Mark. Source: Wellcome Collection.
Provider
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.