TY  - BOOK
AU  - Porter, Michael E.
TI  - Competitive strategy: techniques for analyzing industries and competitors 
SN  - 0029253608
U1  - 658 POR 23
PY  - 1980///
CY  - New York : 
PB  - Free Press
KW  - Competition.
KW  - Industrial management
N1  - Includes bibliographical references and index
ER  -