Armstrong, Michael L. <br/><br/>
Electrocardiograms  a systematic method of reading them 

 - 4th 
 - Bristol  John Wright & Sons Ltd.  1978 
 - 188 
<br/><br/><label>ISBN: </label>0723604622 
<br/><br/><label>Universal Decimal Class. No.: </label>616.12-073.27  / A65