000 00329nam a2200109Ia 4500
008 160405s9999 xx 000 0 und d
020 _a0-684-84148-7
082 _a658
_bPOR
100 _aPorter Michael E
245 _aCompetitive Strategy: Techniques for Analyzing Industries and Competitors
260 _aNew York
_bThe Free Press
999 _c572001
_d572001