000 00296nam a2200121Ia 4500
008 190812s9999 xx 000 0 und d
020 _a9788121902816
100 _aGupta P.K. & Hira D.S
245 0 _aOperation Research 7th edition
260 _bS. Chand Publishing
365 _b650
942 _cBK
999 _c5882
_d5882