Bandara, B.W.M.; Gajanayake, K.G.M.C.P.B.; Jayasinghe-Mudalige, U.K.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2006)
Ariyarathne, G.S.D.P.C.; Gajanayake, K.G.M.C.P.B.; Jayasinghe-Mudalige, U.K.; Senaweera, L.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2006)
Weerakoon, W.M.C.S.; Gajanayake, K.G.M.C.P.B.; Jayasinghe-Mudalige, U.K.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2006)