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Credit
Untersuchungen über nicht celluläre Organismen : namentlich Crustaceen-Panzer, Mollusken-Schalen und Eihüllen / von W. von Nathusius-Königsborn. 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.