TY  - BOOK
AU  - Porter,Michael E.
TI  - Competitive advantage: creating and sustaining superior performance 
SN  - 0743260872 (pbk.)
PY  - 2004///
CY  - New York
PB  - Free
KW  - Competition
KW  - Performance
KW  - Industrial management
N1  - Includes index; Includes bibliographical references
ER  -