Perera, S.A.S.P.; Vithana, M.D.K.; Jayasekera, S.J.B.A.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Sampath, H.A.K.K.; Gajanayake, K.G.M.C.P.B.; Raveendran, K.; Karunarathne, S.B.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2006)
Rathnayake, S.R.P.M.; Weerakkody, W.J.S.K.; Hewagama, K.P.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Idirisinghe, I.M.S.P.; Rathnayake, R.H.M.K.; Edirisinghe, J.C.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)