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Human embryos of His' Normentafel

Human embryos of His' Normentafel [normal plates]. The embryos figured are of the first month (after Keibel and Elze 1908). (Source: Prentiss CW. A laboratory manual and text-book of embryology. Philadelphia and London: WB Saunders, 1915:94. From: Keibel F, Elze C. Normentafel zur Entwicklungsgeschichte des Menschen. Jena: Gustav Fischer, 1908. Based on: His W. Anatomie menschlicher Embryonen. Vol 3: Zur Geschichte der Organe. Leipzig: Vogel, 1885.)