000 00350nam a2200157Ia 4500
008 200202s9999 xx 000 0 und d
082 _a658 POT c.2
100 _a"Porter, Michael E."
245 0 _aCompetitive advantage
260 _aLondon
260 _bMac Millan
260 _c1985
300 _a557p.
650 _aCompetition
942 _cB
999 _c36741
_d36741