Jayakody, Sandunika, and Sajitha Dishanka. “An Estimation of Technical Efficiency of Tea Smallholdings in Ratnapura District of Sri Lanka”. Journal of Social and Development Sciences 10, no. 4(S) (August 22, 2020): 1–11. Accessed October 25, 2026. https://amhinternational.com/jsds/article/view/4272-an-estimation-of-technical-efficiency-of-tea-smallholdings-in-ratnapura-district-of-sri-lanka.