TY  - BOOK
AU  - Porter, Michael E. 
TI  - Competitive advantage : : creating and sustaining superior performance / 
SN  - 0029250900
U1  - FOR 658 P83c 1985 
PY  - 1985///
CY  - New York : 
PB  - The Free Press, 
KW  - Competition.
KW  - Industrial management
N1  - Includes index; Bibliography: pages 537-540
ER  -