Ekanayake, E.M.E.G.P.; Attanayake, A.M.K.B.; Perera, P.I.P.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
Perera, K.G.T.T.; De Silva, D.P.D.C.; Rathnayake, N.R.M.K.N.D.; De Silva, S.N.T.; Senaratne, S.G.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Uthayadarshini, S.; Ranasinghe, A.M.; Perera, A.L.T.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2006)
Mahawaththge, S.A.; Perera, W.G.S.; Dassanayake, E.M.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2006)