000 00279nam a2200121Ia 4500
008 221102s9999 xx 000 0 und d
082 _a658
100 _aPorter, Michael E
245 0 _aCompetitive Advantages
260 _bFree Press
_aUSA
_c1985
300 _a556 p.
942 _cBK
999 _c9213
_d9213