Jayakody, Sarath K . තිරසාර සංවර්ධනය = Tirasara samvardanaya samkalpnathmaka nyaya ha vyavaharikathvaya - University of Kelaniya Sarath. K .Jayakody 2000 - xviii,328p. ISBN: 9789559719700 Subjects--Topical Terms: HUMAN ECOLOGY Dewey Class. No.: 304.2 / J19