Simsion, Graeme C. Data modeling essentials: ultimate reference / By Graeme C. Simsion. - 2 nd ed. - New Delhi : Dreamtech, 2001. - xii,459 p.; PB 24.5 cm. ISBN: 817722302X Subjects--Topical Terms: Basic NormalizationSubtypes and supertypesAdvanced data modeling Dewey Class. No.: 005.7 / SIMG