volume 2 Andas, Celia D. Parpa, Janet C. Morales, kathleen M. Cespon, Laura V. Dorado, Leonardo B. Pidor, Sylvia J. Lozarita, Marilou T. Cadosales, Maria Nancy Q. Alderite, Thelma O. Daligdig, Romeo M. text Quezon City Lorimar Publishing Inc. c2012 monographic 103 p. : figs. & tables ; 28 cm. Celia D. Andas [and nine others]. Educational Technology Prof. 371.33 S741 2012 971-685-740-5