000 00257nam a2200097Ia 4500
008 190719s9999 xx 000 0 und d
100 _aR K Gupta/ Manmohan
245 0 _aProblems in operations research
260 _aNew Delhi
_bSultan Chand
_c2000
942 _cBK
999 _c10679
_d10679