TY  - BOOK
AU  - Yip George S
TI  - Barriers to entry:  A corporate strategy perspectiv   
SN  - 0669052256
U1  - X:517, M2 
PY  - 1982///
CY  - Lexington
PB  - D C Heath        
KW  - Monopoly
N1  - Bibliography: P 213-217; Appendix: P 141-212
ER  -