000 00378nam a22001337a 4500
020 _a0029250900
050 _aHD41
_b.P6681985
100 _aPorter Michael
245 _aCompetitive Advantage
_bCreating and sustaining superior performance
_cMchael E.Porter
260 _aLondon
_bCollier Macmillan
_c1985
300 _axviii;557p.
_bill.index
650 _aCompetition
942 _cLL
999 _c4573
_d4573