Template:Ref-Hertig1945c
From Embryology
Hertig AT. and Rock J. On a normal ovum of approximately 9 to 10 days of age. (1945) Anat. Rec, 91: 281.
Hertig AT. and Rock J. On a normal ovum of approximately 9 to 10 days of age. (1945) Anat. Rec, 91: 281.