00265nam a2200109 a 450000500170000002000150001708200160003210000190004824500250006726000400009230000230013220251203110642.0  a0849328004  a004.36bWEL  aWells,April J.  aGrid Database Design  aLondonbAuerbach Publicationsc2005  axx, 287p.c24cm HB