Ries, Al. <br/><br/>
Focus :  the future of your company depends on it / 
Al Ries. 
 - New York :  Haper Business,  1996. 
 - xii, 304 p. ;  24 cm. 
<br/><br/><label>ISBN: </label>0887307647 
<br/><br/><label>Dewey Class. No.: </label>xxxx  / R559f