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Item Sri Lanka Science and Technology Indicators-Part IV(NARESA:Colombo; 105p, 1996) De Silva, M.A.T.; Yapa, G.; Karunasinghe, A.W.J.Item Mineral nutrition of plants(NARESA:Colombo; 54p, 1980) De Silva, M.A.T.Item Patents in a small developing economy: a case study of Sri Lanka(National Science Foundation:Colombo; 13p, 2010-07-06) Amaradasa, R.M.W.; De Silva, M.A.T.; Pathirage, R.P.Item Directory of medical personnel in Sri Lanka:1977-78(NSC:Colombo; 79p, 1979) Liyanage, S.; De Silva, M.A.T.Item Directory of scientific and technical personnel in Sri Lanka:Scientists and Engineers(NSC:Colombo; 375p, 1979) Liyanage, S.; De Silva, M.A.T.Item A memoir of contributions to science and research capability building in Sri Lanka:Silver jubilee anniversary 1968-1993(Natural Resources Energy Science Authority:Colombo; 52p, 1993) De Silva, M.A.T.; NARESA