Mollin, Richard A. <br/><br/>
Codes  The guide to secrecy from ancient to modern times 

 - New York  Chapman & Hall / CRC  2005 
 - XX  679p.  24 cm.  HB 
<br/><br/><label>ISBN: </label>1584884703 
<br/><br/><label>Dewey Class. No.: </label>005.82  / MOL