TY - BOOK T1 - Cases in competitive strategy A1 - Porter, Michael E. 1947- LA - English PP - New York PB - Free Press YR - 1983 UL - https://tuklas.up.edu.ph/Record/UP-99796217602517380 OP - 541 CN - HD 41 P64 SN - 0029254108 KW - Competition : Case studies. KW - Industrial management : Case studies. ER -