00390nam a2200145 a 450000500170000008200160001710000240003310000200005710000160007724500290009325000120012226000340013430000270016850000490019520251203112333.0  a005.74bSIL  aKorth, Silberschatz  aKorth, Henry F.  aSudarshan S  aDatabase system concepts  a6th ed.  aNew YorkbMcGraw - Hillc2011  axxvi,1350p.c24cm.bPB  aincludes biliographical references and index