Riungu, E. J., H. N. Njenga, and F. D. O. Oduor. “Conversion of Anodizing Sludge into Aluminum Sulphate for Use in Waste Water Treatment”. The International Journal of Science & Technoledge, vol. 5, no. 11, Nov. 2017, https://internationaljournalcorner.com/index.php/theijst/article/view/123692.