Template:Ref-GoodyerGeigerMonroe1942
From Embryology
Goodyer AVN. Geiger AJ. and Monroe WM. Clinical fetal electrocardiography. (1942) Yale J Biol. Med. 15(1): 1–20.7. PMC2601164
Goodyer AVN. Geiger AJ. and Monroe WM. Clinical fetal electrocardiography. (1942) Yale J Biol. Med. 15(1): 1–20.7. PMC2601164