Ranaweera, P.G.V.J.; Senevirathne, M.A.P.K.; Gunasekara, T.M.C.P.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2006)
Rupasinghe, E.M.D.I.; Wijesinghe, M.A.K.; Gunasekara, T.M.C.P.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2006)
Kumarasinghe, W.M.; Perera, S.A.C.N.; Gunasekara, T.M.C.P.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2006)