Browsing by Author "de Costa, W.A.J.M."
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Item Exploitation systems for some hevea brasiliensis muell arg clones for improved economic performance(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2002) Gunasekera, H.K.L.K.; Nugawela, A.; de Costa, W.A.J.M.; Attanayake, D.P.S.T.G.