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This book contains the records of the phonocardiographic heart sounds of infants and young children, optical tracings of the fontanellar pulse and of the femoral and the tibial pulse and records of the cardiac rate and rhythm. It is an exceptionally fine piece of work and although written in Spanish can easily be understood by any one interested in the subject.
Registro e Interpretacion de la Actividad Cardiovascular del Lactante Normal. Am J Dis Child. 1937;54(4):965. doi:10.1001/archpedi.1937.01980040269022
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