Gould, Cecil. <br/><br/>
Leonardo   : the artist and the non-artist /  
by Cecil Gould. 
 - Boston :   New York Graphic Society,   1975. 
 - 192 p. :   il. ;   29 cm. 
<br/><br/> Bibliografía.  Indices. 
<br/><br/><label>ISBN: </label>0-8212-0633-8 
<br/><br/><label>LCCN: </label>3428 
<br/><br/><label>Subjects--Personal Names: </label><br/>Leonardo da Vinci ( 1452-1519) 
<br/><br/><label>Universal Decimal Class. No.: </label>75 Leonardo da Vinci