Klima, Richard E <br/><br/>
Cryptology  classical and modern with maplets 
Richard E Klima and Neil P Sigmon 
 - Boca Raton  CRC  2012 
 - xiv, 541p. 
 - Discrete mathematics and its applications .
<br/><br/><label>ISBN: </label>9781439872413 
<br/><br/><label>Subjects--Index Terms: </label>Cryptology Ciphers 
<br/><br/><label>Universal Decimal Class. No.: </label>004.056.55  / KLI