Pacheerat, Kanokporn, Buncha Somboonsuke, and Chaiya Kongmanee. “Para Rubber Production and Marketing in North Region of Thailand: Case Study in Chiang Mai,Chiang Rai and Phayoa Province”. Kasetsart Journal of Social Sciences 31, no. 2 (August 31, 2010): 206–219. accessed September 22, 2026. https://so04.tci-thaijo.org/index.php/kjss/article/view/246673.