TY  - BOOK
AU  - Porter, Michael E. 
TI  - Competitive Strategy : : techniques for analyzing industries and competitors : with a new introduction/ 
SN  - 0-7432-60880
U1  - Circ. 658 P861c 1980 
PY  - 1980///
CY  - N.Y : 
PB  - Free Press , 
KW  - 1. Competition
KW  - 2. Industrial management
N1  - Includes Bibliographical references and index
ER  -