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

 - First 
 -  The Free Press, New YorkNew York  1990 
 - 396 
<br/><br/> BBM 
<br/><br/><label>ISBN: </label>498 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Management
<br/><br/><label>Dewey Class. No.: </label>658