Saheeka, R.F.; Udugama, J.M.M.; Jayasinghe-Mudalige, U.K.; Attanayake, A.M.C.M.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Weerasekera, W.M.P.M.; Abeynayake, N.R.; Attanayake, A.M.C.M.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Bandara, E.G.C.D.; Mudalige, Jayasinghe U.K.; Udugama, J.M.M.; Attanayake, A.M.C.M.; Edirisinghe, J.C.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)