Template:Ref-Walls1947
From Embryology
Walls EW. The development of the specialized conducting tissue of the human heart. J Anat. 1947 Jan;81(1): 93-110. PMID 17105023
Walls EW. The development of the specialized conducting tissue of the human heart. J Anat. 1947 Jan;81(1): 93-110. PMID 17105023