Beissinger, Janet. <br/><br/>
The cryptoclub:  using mathematics to make and break secret codes/ 
Janet Beissinger, Vera Pless. 
 - Wellesley, Mass.:  A K Peters,  c2006. 
 - xvi, 199 p.:  col. ill.;  23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9781568812236 (alk. paper) 156881223X (alk. paper) 
<br/><br/><label>LCCN: </label>2006002743 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics.<br/>Cryptography.
<br/><br/><label>Dewey Class. No.: </label>510