000 00298nam a2200109 4500
245 _aPrinciples of database systems
_cJeffrey D. Ullman
100 _aUllman, Jeffrey D.
250 _a2nd ed.
260 _aNew Delhi
_bGalgotia Publications
_c1988
300 _avii,484p.; 22cm.
082 _a001.64
_bULL
999 _c65220
_d65220