Oigara , Denis K., and Frank O. Masese. 2017. “ Evaluation of the South African Scoring System (SASS 5) Biotic Index For Assessing The Ecological Condition of the Mara River, Kenya ”. African Journal of Education,Science and Technology (AJEST) 4 (2):Pg 41-51. http://ajest.org/index.php/ajest/article/view/156.