Korth, Henry F. Database system concepts / Henry F. Korth, Abraham Silberschatz. - 2nd ed. - New York : McGraw-Hill, c1991. - xix, 694 p. : ill. ; 25 cm. ISBN: 0070447543 LCCN: 90020826 LC Class. No.: QA76.9.D3 / K67 1991 Dewey Class. No.: 005.74