Template:Ref-Keibelchapter5-1910
From Embryology
Keibel F. V. The formation op the germ layers and the gastrulation problem in Keibel F. and Mall FP. Manual of Human Embryology I. (1910) J. B. Lippincott Company, Philadelphia.
Keibel F. V. The formation op the germ layers and the gastrulation problem in Keibel F. and Mall FP. Manual of Human Embryology I. (1910) J. B. Lippincott Company, Philadelphia.