000 00282nam a2200121Ia 4500
008 230321s9999 xx 000 0 und d
082 _a515.72
_bGUP
100 _aGupta,P.K
245 0 _aIntroduction to operation Research
260 _bS. Chand
_c2012
300 _a1193
942 _cBD
999 _c6385
_d6385