Shell, W E <br/><br/>
The syndrome of midsystolic extra sound and late systolic murmur.  [electronic resource] 

 -  California medicine  Jan 1973 
 - 72-4 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0008-1264 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cineangiography<br/>Electrocardiography<br/>Heart Auscultation<br/>Humans<br/>Methods<br/>Mitral Valve Insufficiency--diagnosis