Boas, N F <br/><br/>
Cardiotachometer.  [electronic resource] 

 -  Science (New York, N.Y.)  Feb 1960 
 - 564-5 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0036-8075 
<br/><br/><label>Standard No.: </label>10.1126/science.131.3399.564  doi