000 00275nam a22001217a 4500
020 _a9788121902816
082 _a658.4034
100 _aGUPTA PREM
_aD.S HIRA
245 _aOPERATION RESEARCH
260 _aNEW DELHI
_bS. CHAND
_c1976
300 _aXII, 1498P
942 _cBK
999 _c8817
_d8817