Thomas, Rachael L. <br/><br/>
Classic codes and ciphers 
/ Rachael L. Thomas 
 - 1 online resource :  illustrations 
 - Cryptology .
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9781728417950 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cryptography<br/>Ciphers