Singh,Simon <br/><br/>
The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptographyß 

 - New York  Anchor Books  1999 
 - xviii,410p 
<br/><br/><label>ISBN: </label> RS 1380.40 
<br/><br/><label>Dewey Class. No.: </label>652.809