Hettiarachchi, Kumaradasa පාසල්හි ප්රායෝගික කළමනාකරණය Paasalhi Praayogika Kalamanakaranaya - Colombo S.Godage Brothers 1998 - (xxiii)340, 21.5 cm Subjects--Topical Terms: Education Mamagement Universal Decimal Class. No.: x 37 HET