TY - JOUR T1 - EVOLUTION OF GRAPHIC SYMBOLS FOR CARDIOVASCULAR SOUNDS AND MURMURS JF - British Heart Journal JO - Heart SP - 1 LP - 10 DO - 10.1136/hrt.24.1.1 VL - 24 IS - 1 AU - Harold N. Segall Y1 - 1962/01/01 UR - http://heart.bmj.com/content/24/1/1.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -