Template:Ref-Patten1909
From Embryology
Patten CJ. External Features of an Early Human Embryo with a Distended Amnion. (1909) J Anat Physiol. 43(3): 235-241. PMID: 17232803
Patten CJ. External Features of an Early Human Embryo with a Distended Amnion. (1909) J Anat Physiol. 43(3): 235-241. PMID: 17232803