Kanchak, Angsuma, Somsanguan Passago, Pornpimol Ponkham, and Somsuk Trisupakitti. “Heavy Metal Contamination in Soil at Waste Disposal Site and Surrounding Paddy Field Area in Khok Sa-At Subdistrict Administrative Organization, Khong Chai District, Kalasin Province”. Burapha Science Journal 26, no. 1 January-April (March 18, 2026): 610–627. accessed September 2, 2026. https://li05.tci-thaijo.org/index.php/buuscij/article/view/1456.