Piyawathie, W.G.G.A. ඔබ විභාගයට බයද.? = oba viBaagayata bayada - Colombo; W.G.G.A. Piyawathi, 2008. - 63p. 21cm ISBN: 955-95819-7-x Subjects--Topical Terms: Memory and LearningPsychology Dewey Class. No.: 153.1 / PIY