Porter, Michael E. <br/><br/>
Competitive advantage :  Creating and sustaining superior performance / 
Michael E. Porter. 
 - New York :  The Free Press,  c1985. 
 - xviii, 557 p. :  ill. ;  26 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9780029250907 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Industrial management
<br/><br/><label>Dewey Class. No.: </label>658  / POR