Singh, Simon, <br/><br/>
The code book :  the science of secrecy from ancient Egypt to quantum crytography / 
Simon Singh. 
 - New York :  Anchor Books,  1999. 
 - 410 p. :  il., fasc. ;  21 cm. 
<br/><br/> Incluye índice 
<br/><br/><label>ISBN: </label>0385495323 
<br/><br/><label>Dewey Class. No.: </label>nnnn  / S6173c