Porter, Michael E. <br/><br/>
Competitive advantage 

 - London  Collier macmillan  1985 
 - xviii,557p. 
<br/><br/><label>ISBN: </label>0029250900 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Management
<br/><br/><label>Dewey Class. No.: </label>658  / POR