Pakeechai, Kanokporn, Buncha Somboonsuke, and Onanong Longpichai. “Technology Utilization for Farm Management of Rubber Smallholding Among Rubber Ecological Zones”. Kasetsart Journal of Social Sciences 34, no. 2 (August 31, 2013): 195–209. Accessed May 20, 2024. https://so04.tci-thaijo.org/index.php/kjss/article/view/246886.