Template:Ref-Bartelmez1924
From Embryology
Bartelmez GW. Ectodermal areas of the head in young human embryos. (1924) Proc. Amer. Soc. Zool., Anat. Rec. 29: 109.
Bartelmez GW. Ectodermal areas of the head in young human embryos. (1924) Proc. Amer. Soc. Zool., Anat. Rec. 29: 109.