Gelb, Michael J. <br/><br/>
Da Vinci decoded : discovering the spiritual secrets of Leonardo's seven principles 

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 - New York  Delacorte Press   2004 
 - xxiv, 189p. : ill. ; 22 cm. 
<br/><br/><label>ISBN: </label>0385339399 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Leonardo, da Vinci, 1452-1519 Creative thinking
<br/><br/><label>Dewey Class. No.: </label>158.1 Gel/Da-V