%0 Journal Article %A William Evans %T CHEST LEAD (CR1) ELECTROCARDIOGRAMS IN AURICULAR FIBRILLATION %D 1941 %R 10.1136/hrt.3.4.247 %J British Heart Journal %P 247-258 %V 3 %N 4 %U https://heart.bmj.com/content/heartjnl/3/4/247.full.pdf