Okademi , Nancy, Osano Odipo, and Judith Khazenzi. “ Defluorination Effectiveness of Modified Biosand Filters ”. African Journal of Education,Science and Technology (AJEST) 7, no. 1 (June 16, 2022): Pg 123–140. Accessed May 18, 2026. https://ajest.org/index.php/ajest/article/view/814.