RT Journal Article SR Electronic T1 THE LEFT PARASTERNAL IMPULSE JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 726 OP 736 DO 10.1136/hrt.26.6.726 VO 26 IS 6 A1 P. M. S. Gillam A1 A. A. Deliyannis A1 J. P. D. Mounsey YR 1964 UL http://heart.bmj.com/content/26/6/726.abstract AB