TY  - BOOK
AU  - Porter Michael E
TI  - Competitive strategy: Techniques for analyzing ind   
SN  - 0684841487
U1  - X:516, M0 
PY  - 1980///
CY  - New York
PB  - Free Press        
KW  - Competition
N1  - Bibliography: p  383-388; Appendix: p 361-382
ER  -