Marthuprema, J.A. ජීවන ගැටඵ සහ මනෝ විද්යාව = jiivana gaetalu saha manoo vidhyaava - Colombo; Dayawansha Jayakodi pub, 1985. - 149p. 20cm ISBN: 955-551-139-x Subjects--Topical Terms: Developmental Psychology Dewey Class. No.: 155.2 / MAT