Snellen, H. A. <br/><br/>
Selected papers on electrocardiography of Willem Einthoven :  with bibliography, biographical notes and comments / 
by H. A. Snellen 
 - Leiden :  Leiden University Press,  1977 
 - 306 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>906021420x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electrocardiography