Riseman, Joseph E. F.  1903- <br/><br/>
P-Q-R-S-T, a guide to electrocardiogram interpretation. 

 - 2d ed. ... 
 - New York,  Macmillan,  1947. 
 - 84 p.  ill. 
<br/><br/><label>LCCN: </label>med47001960  
<br/><br/><label>LC Class. No.: </label>RC683  / .R5 1947 
<br/><br/><label>National Library of Medicine Call No.: </label>WG 140  / R595p 1947