Template:Ref-Ingalls1920a
From Embryology
Ingalls NW. Symmetrical, segmental thickenings in the dorsal ectoderm of human embryos. (1920) Amer. J Anat. 44(3): 454-473.
Ingalls NW. Symmetrical, segmental thickenings in the dorsal ectoderm of human embryos. (1920) Amer. J Anat. 44(3): 454-473.