Edirisinghe, J.Wijesuriya, W.Bogahawatte, C.2014-07-102014-07-102010Journal of the Rubber Research Institute of Sri Lanka, 90:p.64-77https://dl-rri.nsf.gov.lk//handle/1/2368AgricultureRubberSmallholdersRubber productionProfit efficiencyAgricultural economicsProfit efficiency of smallholder rubber farmers in Kegalle, Kalutara and Ratnapura districtsArticle