Abeyratne, Shyamala Change and continuity in village irrigation systems a case study in the Moneragala district Sri Lanka - Colombo Agrarian Research and Training Institute 1986 - ix,153p. 29cm - Research study No. 75 . Subjects--Topical Terms: DAMS AND RESERVOIRSHYDRAULIC ENGINEERING Dewey Class. No.: 627.8 / ABE