000 00337nam a2200121Ia 4500
100 _aMagretta, Joan
020 _a9781422160596
942 _cBK
245 _aUnderstanding michael porter
_bthe essential guide to competition and strategy
260 _aHarvard Business Review, Boston
_c2012
082 _a658.4012 Mag
300 _ax, 236 p
999 _c48873
_d48873