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Item Heavy metals in road deposited sediments and road dusts of Colombo Capital, Sri Lanka(NSF:Colombo, 2016-06) Herath, D.; Pitawala, A.; Gunatilake, J.Item Performance evaluation of four wheel tractor driven high capacity combined paddy thresher(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2011) Weerasooriya, G.V.T.V.; Bandara, M.H.M.A.; Rambanda, M.