000 00211 a2200097 4500
001 1822
100 _aAckoff, R.L.
245 _aManagersguide to operation research
260 _a
_bWiley
_c
090 _c1328
_d1328
942 _aNUST-CAE
_cM
_c3647
999 _c236895
_d236895