Pacheerat, K., Somboonsuke, B. and Kongmanee, C. (2010) “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(2), pp. 206–219. available at: https://so04.tci-thaijo.org/index.php/kjss/article/view/246673 (accessed: 29 September 2026).