Hardy, G. H. <br/><br/>
Applied algebra: Codes, ciphers, and discrete algorithms (with cd) 

 - 2nd Edition 
 - London  Taylor & Francis Group  2009 
 - 410p. 
<br/><br/><label>ISBN: </label> RS 3680.18 (UKP 44.99) 
<br/><br/><label>Source: </label> RS 3680.18 (UKP 44.99) 
<br/><br/><label>Dewey Class. No.: </label>512 HAR