000 00408nam a2200145Ia 4500
008 180712s9999 xx 000 0 und d
020 _a29250900
082 _a658
_bPOR
100 _aPorter, Michael E.
245 _aCompetitive advantage: creating and sustaining superior performance
260 _aNew York
_bThe Free Press
_c1985
300 _axviii, 557 p.
650 _aIndustrial management
942 _cS
999 _c9180
_d9180