TY - JOUR T1 - VECTORCARDIOGRAMS OF NORMAL AND PREMATURE BEATS IN DIFFERENT LEAD SYSTEMS JF - British Heart Journal JO - Heart SP - 1 LP - 4 DO - 10.1136/hrt.17.1.1 VL - 17 IS - 1 AU - W. Den Boer AU - H. C. Burger AU - J. B. Van Milaan Y1 - 1955/01/01 UR - http://heart.bmj.com/content/17/1/1.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -