Edirisinghe, J.Wijesuriya, W.Bogahawatte, C.2012-06-252012-06-252010Journal of the Rubber Research Institute of Sri Lanka90pp.64-77https://dl.nsf.gov.lk/handle/1/8919AgricultureRubberSmallholdersRubber productionProfit efficiencyAgricultural economicsProfit efficiency of smallholder rubber farmers in Kegalle, Kalutara and Ratnapura districtsArticle