Ayad A. H. Faisal, Basim J. Bedah BJB, Al-Hashimi O. Constructed Wetland Units Filled with Waterworks Sludge for Remediating of Wastewater Contaminated with Congo Red Dye. IJCPE. 2022;23(2):9-17. doi:10.31699/IJCPE.2022.2.2