000 00270nam a2200109Ia 4500
008 170707s9999 xx 000 0 und d
050 _a005.74 D262
100 _a"Date, C. J."
245 3 _aAn introduction to database systems
260 _c1990
942 _2lcc
_cBK
_kCirc.
999 _c12708
_d12708