Template:Ref-Watt1915
From Embryology
Watt JC. Description of two young twin embryos with 17-19 paired somites. (1915) Contrib. Embryol., Carnegie Inst. Wash. 2: 15-54.
Watt JC. Description of two young twin embryos with 17-19 paired somites. (1915) Contrib. Embryol., Carnegie Inst. Wash. 2: 15-54.