Muadchim, M., M. Do, S. Chuasuwan, S. Mad-Adam, A. Siriwat, and S. Anutarapongsakul. “Water Supply and Well Water Suitability for Drinking in Communities at Sumnakkham in Songkhla Special Economic Zone and Nearby Area”. YRU Journal of Science and Technology, vol. 6, no. 2, Oct. 2021, pp. 211-8, https://li01.tci-thaijo.org/index.php/yru_jst/article/view/251106.