TY  - BOOK
AU  - Porter,Michael E.
TI  - Competitive advantage: creating and sustaining superior performance : with a new introduction 
SN  - 0684841460
AV  - HD41 .P67 1998
PY  - 1998///
CY  - New York
PB  - Free Press
KW  - Competition
KW  - Industrial management
N1  - Includes bibliographical references and index; Management
ER  -