Walpola, B.C.; Priyangi, W.A.A.; Pitigala, P.K.U.; Piyadharshani, S.H.R.; Wanniarachchi, S.D.(Faculty of Agriculture, University of Ruhuna, Sri Lanka, 2008-10-23)
Walpola, B. C,; Priyangi, W.A.A,; Pitigala, P.K.U,; Piyadharshani, S.H.R,; Wanniarachchi, S.D,(Faculty of Agriculture, University of Ruhuna, Sri Lanka, 2008)