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)
Susantha, M.P.A.; Galahitiyawa, G.L.C.; Gajanayake, K.G.M.C.P.B.; Amarapana, W.M.U.A.B.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2006)
Wijebandara, K.M.N.; Fernando, L.C.P.; Fernandopulle, M.N.D.; Suwandharathne, N.I.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2006)
Sooriyapperuma, S.R.R.; Wijesinghe, M.A.K.; Fernandopulle, M.N.D.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2006)