Kadugammulla, B.P.; Ranasinghe, C.S.; Abeysinghe, D.C.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Kankanamalage, T.N.M.; Dharmadasa, R.M.; Abeysinghe, D.C.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)