Porter Michael E <br/><br/>
Competitive advantage of nations 
Porter Michael E 
 - London  Macmillian UK           1990 
 - xx, 855p  cm. 
<br/><br/> Bibliography: p 815-31 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X9:516.1.N9, N0/TD1