000 00279nam a2200109Ia 4500
008 230411s9999 xx 000 0 und d
082 _a658.4034
_bGup
100 _a Gupta (Prem kumar) & Hira (d.s)
245 0 _aOperations Research
260 _bS.Chand
_aNEW DELHI
942 _cBK
999 _c3413
_d3413