Porter, Michael E <br/><br/>
Competitive advantage: Creating and sustaining superior performance 
Porter, Michael E 
 - 
 - Free Press: Newyork  1985 
 - 557 p 
 - .
<br/><br/>  
<br/><br/><label>ISBN: </label>29250900  575 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Strategic management
<br/><br/><label>Dewey Class. No.: </label>R 658.402  POR