000 00270nam a2200109Ia 4500
008 220201s1993 xx 000 0 eng d
100 _aOCCARDI VAL
245 0 _aRELATIONAL DATABASE THEORY AND PRACTICES
260 _aDELHI
_bBPB PUB
_c1993
300 _a304
942 _2ddc
999 _c92375
_d92375