Hardy Darel, W <br/><br/>
Applied Algebra : Codes, ciphers, and discrete algorithms 

 - 2nd ed 
 - Boca Raton, FL:  Boca Raton, FL,  2009 
 - 410p 
<br/><br/><label>ISBN: </label>9781420071429 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Systems
<br/><br/><label>Dewey Class. No.: </label>003.54 HAR