Athukorala, A.C.H.; Jayasinghe-Mudalige, U.K.; Silva, K.D.R.R.; Chadrasekera, G.A.P.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2006)
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)