Sajeewani, M.A.I.; Withanage, S.P.; Attanayaka, D.P.S.T.G.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)
Fonseka, A.A.S.; Withanage, S.P.; Attanayaka, D.P.T.S.G.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)
Deepika, U.K.D.K.; Senevirathne, P.; Nayanakantha, C.; Wickramasinghe, W.M.E.P.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)
Edirisinghe, E.A.D.D.; Withanage, S.P.; Attanayaka, D.P.S.T.G.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2006)