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Ueber die Einwirkung des Harnstoffs auf die motorischen Nerven des Frosches : Inauguraldissertation der medicinischen Facultät zu Erlangen vorgelegt / von Friedrich Richter. 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.