Mohd Arshad, Nur Ain Nazirah, and R. Hamdan. “Study of Steel Slag Filter Unit As a Secondary Treatment System for Removing Total Phosphorus from Textile Industry Wastewater”. International Journal of Integrated Engineering 13, no. 3 (June 3, 2021): 192–199. Accessed April 29, 2024. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/8930.