Vasta, Joseph A. Understanding database management systems / [electronic resource] / Joseph A. Vasta.. — 2nd ed.. — Belmont, Calif. : : Wadsworth Pub. Co.,, c1989.. — xviii, 519 p. : : ill. ; 25 cm. - Wadsworth series in computer information systems.
Rev. ed. of: Understanding data base management systems. c1985. Includes index.