Date, C. J. The Database relational model : a retrospective review and analysis / C. J. Date. - Reading, Massachusetts, Addison-Wesley, c2001. - viii, 152 p. : ill. ; 22 cm. Includes bibliographical references and index. ISBN: 0201612941 Subjects--Topical Terms: Relational databases. LC Class. No.: QA76.9 / D37 2001