1. A method for the electrocardiographic recognition of atrial enlargement;Macruz;Circulation,1958
2. Electrocardiographic studies in normal infants and children;Ziegler,1951
3. Evolution of the electrocardiogram of healthy premature infants during the first year of life;Walsh;Acta paediat,1963
4. Heart volume in normal infants;Lind;Acta radiol.,1950
5. Sphygmomanometer for the newborn;Ashworth;Lancet,1959