Template:Ref-RockHertig1948
From Embryology
Rock J. and Hertig AT. The human conceptus during the first two weeks of gestation. (1948) Amer. J. Obstet. Gynecol, 55: 6-17.[[Category:Arthur Hertig]
Rock J. and Hertig AT. The human conceptus during the first two weeks of gestation. (1948) Amer. J. Obstet. Gynecol, 55: 6-17.[[Category:Arthur Hertig]