Phonvisai, Phengkhamla, and Jiragorn Gajaseni. “Environmental Management and Monitoring of Mining Operation in Lao PDR”. Applied Environmental Research 36, no. 1 (February 21, 2014): 47–53. Accessed May 26, 2024. https://ph01.tci-thaijo.org/index.php/aer/article/view/16348.