RT Journal Article SR Electronic T1 Quantitative aspects of electrocardiograms of adults in a Jamaican rural population. JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 829 OP 839 DO 10.1136/hrt.35.8.829 VO 35 IS 8 A1 Ruiz, L A1 Miall, W E A1 Swan, A V YR 1973 UL http://heart.bmj.com/content/35/8/829.abstract AB