000 00287nam a2200121Ia 4500
008 220201s2018 xx 000 0 eng d
100 _aGupta, P K
245 0 _aOperation research
250 _a7th
260 _aNew Delhi
_bS Chand
_c2018
650 _aOPERATIONS RESEARCH
942 _2ddc
999 _c70348
_d70348