Abeysinghe, A.M.S.M.; Seneviratne, K.A.C.N.; Yakandawala, K.; Seneviratne, G.; Adikaram, N.K.B.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka:Makandura, 2018)
Rajapaksha, E.R.G.I.C; Seneviratne, K.A.C.N.; Yakandawala, K.; Seneviratne, G.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka,:Makandura, 2018)