Pingcarak, Lucksanatid, Sayfon Tidkongrach, Metawee Thammaprasert, and Kitakarn Janthong. 2023. “Removal of Lead and Copper from Contaminated Water Using Shells Chemical Precipitation”. Journal of Advanced Development in Engineering and Science 12 (35). Babgkok, Thailand:80-91. https://ph03.tci-thaijo.org/index.php/pitjournal/article/view/984.