Elmasri; Ramez , Somayajulu;Durvasula V.L.N.,Navathe;Shamkant B.,Gupta;Shyam K. Fundamentals of database system English - 4th ed. - Delhi Pearson India Education Services 2008 - 799pg ISBN: 81-7758-475-0 Subjects--Geographic Terms: Computer Science Dewey Class. No.: 005.74 E61F