TY - JOUR T1 - A QUANTITATIVE ELECTROCARDIOGRAPHIC METHOD JF - British Heart Journal JO - Heart SP - 173 LP - 179 DO - 10.1136/hrt.7.4.173 VL - 7 IS - 4 AU - H. E. S. Pearson AU - L. M. Gerlis Y1 - 1945/10/01 UR - http://heart.bmj.com/content/7/4/173.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -