Template:Ref-Butler1927
From Embryology
Butler EG. The relative role played by the embryonic veins in the development of the mammalian vena cava posterior. (1927) Amer. J Anat. 39(2): 267-.
Butler EG. The relative role played by the embryonic veins in the development of the mammalian vena cava posterior. (1927) Amer. J Anat. 39(2): 267-.