00277nam a22001097a 4500008004100000020001800041100001500059245004800074250001200122260002500134300000800159251013b        |||||||| |||| 00| 0 eng d  a81-85015-58-9  aC. J. Date  aAn Introduction to Database Systems 3rd Ed.  a3rd Ed.  aNew DelhibNPHc1993  a580