Munasinghe, M.A.B.J.; Balasooriya, B.L.W.K.; Piyathilaka, M.A.P.C.; Amarawansa, R.P.U.I.; Dandeniya, W.S.; Dharmakeerthi, R.S.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka:Makandura, 2018)
Sadharekha, W.M.G.W.; Balasooriya, B.L.W.K.; Amarawansa, R.P.U.I.; Dandeniya, W.S.; Dharmakeerthi, R.S.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka:Makandura, 2018)
Wijekoon, H.M.K.G.U.K.; Dissanayake, D.M.P.S.; Weerakkody, W.J.S.K.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka,:Makandura, 2018)