The unknown Leonardo / 
edited by Ladislao Reti 
 - London :  Hutchinson,  c1974 
 - 319 p. :  ill. (some col.), facsims , maps, ports. ;  33 cm. 
<br/><br/><label>ISBN: </label>009120660X :  PND 9.75 
<br/><br/><label>Subjects--Personal Names: </label><br/>Leonardo, da Vinci,  1452-1519 
<br/><br/><label>Subjects--Corporate Names: </label><br/>Madrid. Biblioteca Nacional. --MSS. (8936-8937)
<br/><br/><label>Dewey Class. No.: </label>92