Zanelli, Leo. <br/><br/>
Subaqua swimming. 

 - 1st Ed. 
 - London :  Teach Yourself Books,  1976. 
 - 202 p.  
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0340207663 : 
<br/><br/><label>Dewey Class. No.: </label>797.23  / ZAN