Limpapinun, J. ., and J. . Saisuntorn. “Legal Measures for the Control Contamination of Heavy Metals In Groundwater from Factory Operations”. Rajapark Journal, vol. 15, no. 41, July 2021, pp. 89-100, https://so05.tci-thaijo.org/index.php/RJPJ/article/view/251099.