000 00271nam a2200121Ia 4500
008 221219s9999 xx 000 0 und d
100 _aS.K.Kalavathy
245 0 _aOprational Research
250 _a4th
260 _bVikas Pub.House
650 _aExtension
942 _cBK
999 _c3497
_d3497