Barrer, Gladys Aquinde, Gladys Abe, Lesley Caro, Jaime D.L. text Quezon City TechFactors Inc. c2011 4th ed. monographic vi, 147 p. : some col., some ill. ; 26 cm. Gladys E. Barrer et al. Includes bibliography. Databases in computer science 005.74 D232 2011 9789710550227