(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2010) Jayasinghe, I.H.; Basnayake, B.F.A.; Amarathunga, K.S.P.; Dissanayake, P.B.R.
(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 1996) Weerakoon, T.C.T.; Pilapitiya, S.C.; Kotagama, H.B.; Senanayake, Y.D.A.
