000 00286nam a2200121Ia 4500
008 150217s1985 xx 000 0 und d
100 _aPorter M E
245 _aCompetitive Advantage
260 _bThe Free Press
_c1985
300 _a558
365 _b850-00
366 _e790-792/10/10/99
999 _c64205
_d64205