TY  - BOOK
AU  - Porter,Michael E.
AU  - 
TI  - Competitive strategy : 
SN  - 978 0 7432 6088 6  
U1  - 658/P861c 
PY  - 0000///Free press
PY  - 1980///
CY  - New York 
KW  - Industrial Management.
KW  - Management.
N1  - Includes index(P389-396) and bibliography(P383-387).
ER  -