00358nam a22001337a 450000500170000000800410001704000130005808200220007110000150009324500510010825000080015926000460016730000110021320150507111614.0150507b        xxu||||| |||| 00| 0 eng d  cPK-LaUMT  aKHC 005.74bDAT-I  aDate, C.J.  aAn introduction to database systemscC.J. Date  a7th  aLondonbCambridge Unicversity pressc1994  a938 p.