Kaddoura, Sam,  <br/><br/>
Echo made easy 

 - xii, 232 pages :   colour illustrations ;   19 cm 
<br/><br/><label>ISBN: </label>9780443103643 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cardiovascular system
<br/><br/><label>Dewey Class. No.: </label>616.1