00274nam a2200097Ia 4500008004000000082001600040100004700056245003000103260003100133300001200164210210b1991   xxu||||| |||| 00| 0 eng d  a005.74 KORD  aKORTH (Henry F) and SILBERSCHATZ (Abrahm).  aDatabase system concepts.  aNYbMcGraw Hill Inc.c1991  axix,694