Template:Ref-Johnston1931
From Embryology
Johnston TB. Partial duplication of the notochord in a human embryo of 11 mm. greatest length. (1931) J Anat. 66: 48-49. PMID 17104357
Johnston TB. Partial duplication of the notochord in a human embryo of 11 mm. greatest length. (1931) J Anat. 66: 48-49. PMID 17104357