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

 - New York  Free Press  1985 
 - 557 p. 
<br/><br/><label>ISBN: </label>29250900 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Competition
<br/><br/><label>Dewey Class. No.: </label>IB 658