000 00277nam a2200121Ia 4500
008 230222s9999 xx 000 0 und d
082 _a519.72
100 _aPrem Kumar Gupta
245 0 _aOperation Research
250 _a7
260 _bS Chand, New Delhi
_c2015
942 _cBK
999 _c34580
_d34580