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Adolf Ziegler, Development of the facial regions of early human embryos, 1850
EMBRYO, face, @MKS-b - 2Adolf Ziegler, Wax models showing early development to primitive streak stage, 1850 - 1850
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EMBRYOGENESIS, @MKW - 3Adolf Ziegler, Wax models showing the external appearance of early human embryos, between 3-8 weeks of pregnancy, 1850
EMBRYO, @MKS-a