Porter, Michael E.,  1947- <br/><br/>
Competitive advantage :  creating and sustaining superior performance. 

 - New York :  Free Press,  1985. 
 - xvii, 557 p. ;  24 cm. 
<br/><br/>
<br/><br/><label>ISBN: </label>0029250900 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Competition.<br/>Industrial management.
<br/><br/><label>Dewey Class. No.: </label>