BLEIFER, S The auscultatory and phonocardiographic signs of ventricular septal defects. [electronic resource] - The American journal of cardiology Feb 1960 - 191-8 p. digital Publication Type: Journal Article ISSN: 0002-9149 Standard No.: 10.1016/0002-9149(60)90198-3 doi Subjects--Topical Terms: Heart Septal DefectsHeart Septal Defects, VentricularHeart Septum--abnormalitiesHumansPhonocardiographyPhysical Examination