000 00343nam a2200145Ia 4500
008 221102s9999 xx 000 0 und d
020 _a8174461159
082 _a658.5 GUP-O
100 _aGupta, Anju
245 0 _aOperation research
260 _bExcell Pub
_aDelhi
_c1998
300 _a238p p.
650 _aOperation research
942 _cBK
999 _c1990
_d1990