000 00277nam a2200109Ia 4500
008 231219s9999 xx 000 0 und d
041 _aeng
100 _aChurchman C.W. Ackoff. R.L.
245 _aIntroduction to Operations Rescarch.
260 _bOTHER
650 _aManagement
999 _c974380
_d974380