RT Journal Article SR Electronic T1 VENTRICULAR SEPTAL DEFECT IN EARLY CHILDHOOD JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 265 OP 276 DO 10.1136/hrt.12.3.265 VO 12 IS 3 A1 Marquis, R. M. YR 1950 UL http://heart.bmj.com/content/12/3/265.abstract AB