สุดบรรฑิตย์ อ., & ชั่งชัย ณ. (2018). The paint factory’s wastewater: COD removal by chemical precipitation method. RMUTSB ACADEMIC JOURNAL, 6(2), 171–181. Retrieved from https://li01.tci-thaijo.org/index.php/rmutsb-sci/article/view/149278