Grant, Robert Purves. <br/><br/>
Grant's clinical electrocardiography :  the spatial vector approach. 

 - 2nd ed. rev. / by Julian R. Beckwith.  2nd ed. rev. / by Julian R. Beckwith. 
 - New York :  McGraw-Hill,  [1970] 
<br/><br/>Bibliography: p. 219-220. 
<br/><br/><label>LCCN: </label>77098047 //r832 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Vectorcardiography.
<br/><br/><label>LC Class. No.: </label>RC683.5.E5  / G65 1970 
<br/><br/><label>Dewey Class. No.: </label>616.1/2/0754