Aloysius, N.M.; Abeynayake, N.R.; Wijeyewardena, H.M.S.L.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
Fasmina, M.F.F.; Jayasinghe, J.M.U.K.; Wickramasinghe, W.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)
Dharmarathna, K.P.D.U.; Jayasinghe-Mudalige, U.K.; Silva, K.D.R.R.; Chandrasekara, G.A.P.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2006)
Ranaweera, C.D.; Gunathilaka, H.A.W.S.; Widanapathirana, A.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)