Date, C.J. An introduction to database systems / Introduction to data base systems C.J. Date. - 5th ed. - Reading, Mass. : Addison-Wesley, c1990. - v. 1 : ill. ; 25 cm. - Addison-Wesley systems programming series . Includes bibliographical references and index. ISBN: 0201528789 Subjects--Topical Terms: Database management. LC Class. No.: QA76.9.D3 / D37 1990