Template:Ref-Ingalls1920
From Embryology
Ingalls NW. A human embryo at the beginning of segmentation, with special reference to the vascular system. (1920) Carnegie Instn. Wash. Publ. 274, Contrib. Embryol., 11: 61-90.
Ingalls NW. A human embryo at the beginning of segmentation, with special reference to the vascular system. (1920) Carnegie Instn. Wash. Publ. 274, Contrib. Embryol., 11: 61-90.