Keet, Ernest E.. <br/><br/>
Preventing Piracy: A Business Guide to Software Protection /  

 - 1st ed /  
 - Massachusetts :   Addison-Wesley Publishing Company ,   1989 
 - p156 :  
<br/><br/><label>ISBN: </label>0-201-15047-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer Science
<br/><br/><label>Dewey Class. No.: </label>Bv  / M5