Pitigala, P.K.D.S.D.; Gunarathne, G.P.; Abeysinghe, D.C.; Fernandopulle, M.N.D.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Palliyaguru, S.J.; Gunarathne, G.P.; Abeysinghe, D.C.; Fernandopulle, M.N.D.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)