000 00282nam a2200121Ia 4500
020 _a9788175155459
100 _aJeffrey D Ullman
245 _aPrinciples of Database Systems
250 _a3rd
260 _c2008
_bGalgotia Publications
_aNew Delhi
300 _axi+670
942 _cBK
999 _c35184
_d35184