000 00413nam a2200157Ia 4500
008 251125s2021 xx 000 0 und d
020 _a9788121902816
041 _aeng
082 _a658.403/GUP/HIR
100 _aGUPTA PREM KUMAR, HIRA D. S.
245 _aOPERATION RESEARCH (7TH ED.)
250 _a7th Ed.
260 _aNEW DELHI
_bS CHAND AND COMPANY LTD.
_c2021
300 _a1498p
650 _aRESEARCH
999 _c1213497
_d1213497