Arsa R, Detboon P, Rattanawong P, Sudthee A, Lakaew D. “Health Status of Rubber Farmers in Namteang Sub-District, Srimuangmai District, Ubonratchathani Province”. Journal of The Department of Medical Services, vol. 43, no. 5, Oct. 2018, pp. 105-8, https://he02.tci-thaijo.org/index.php/JDMS/article/view/247792.