Neranjika, V.P.M.; Abeynayake, N.R.; Fernando, M.T.N.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)
Dassanayake, H.P.C.M.; Ranawana, S.S.E.; Abeynayake, N.R.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)
Bulathsinhala, B.B.M.; Rathnayake, R.M.G.K.B.; Abeynayake, N.R.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)