Berloquin, Pierre <br/><br/>
Hidden Codes and Grand Designs:  Secret Languages From Ancient Times To Modern Day 

 - New York:  Sterling,  2008. 
 - 375p. : 
<br/><br/>Includes Bibliographic References and Indexes. 
<br/><br/><label>ISBN: </label>978-1-4027-7300-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Secret Languages--Covert Communications--Secret Symbols
<br/><br/><label>Dewey Class. No.: </label>400  / BER