Elmasri, Rameri Fundamentals of database systems - 4th ed. - India: Dorling Kindersley (India) Pvt. Ltd., 2006 - xxxi, 799p. ISBN: 81-7758-476-6 Subjects--Topical Terms: Database systems Subjects--Index Terms: Conceptual modeling Database data Universal Decimal Class. No.: D 681.3.016/.019 / P4