Madhusanka, W.P.C.; Ranaweera, B.; Subashini, J.K.W.N.; Karunarathne, K.H.M.I.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka:Makandura, 2020)
Dilani, A.V.P.A.; Dissanayake, D.M.P.S.; Weerakkody, W.J.S.K.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka:Makandura, 2018)
Rathnayake, R.M.S.J.; Dissanayake, D.M.P.S.; Weerakkody, W.J.S.K.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka:Makandura, 2013)
Jayathilake, T.S; Dissanayake, D.M.P.S.; Weerakkody, W.J.S.K(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka:Gonawila, 2016)
Rathnayake, R.M.S.J.; Dissanayake, D.M.P.S.; Weerakkody, W.J.S.K.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka:Makandura, 2013)