TY  - BOOK
AU  - Porter, Michael E.
TI  - Competitive advantage: creating and sustaining superior performance / 
SN  - 0-7432-6087-2
U1  - 658 
PY  - 1985///
CY  - New York
PB  - Free Press
KW  - Management
KW  - Management of Technology
KW  - Value chain
KW  - Differentiation Strategy
KW  - Cost Analysis
ER  -