Template:Ref-Patten1949
From Embryology
Patten BM. Initiation and early changes in the character of the heart beat in vertebrate embryos. (1949) Physiol Rev. 29(1): 31-47. PMID 18125910
Patten BM. Initiation and early changes in the character of the heart beat in vertebrate embryos. (1949) Physiol Rev. 29(1): 31-47. PMID 18125910