TY  - BOOK
AU  - Porter, Michael E.
TI  - Competitive strategy: : techniques for analyzing industries and compertitors 
SN  - 0743260880
U1  - 658.4092  1
PY  - 1980///
CY  - New York
PB  - Free press
KW  - Competitive strategy in emerging industries
KW  - Strategy toward buyers and suppliers
ER  -