Fernando, I.D.N.S.; Abeysinghe, D.C.; Dharmadasa, R.M.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Abeysiri, G.R.P.I.; Dharmadasa, R.M.; Abeysinghe, D.C.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)