Onesmus Nzung’a, S., K. Kiplagat, and O. Paul. “TECHNIQUES FOR POTABLE WATER TREATMENT USING APPROPRIATE LOW COST NATURAL MATERIALS IN THE TROPICS”. Journal of Microbiology, Biotechnology and Food Sciences, vol. 2, no. 5, Apr. 2013, pp. 2294-00, https://office2.jmbfs.org/index.php/JMBFS/article/view/7111.