Wamalwa , K.W., J. Lusweti, S. Lutta, B. C. Anditi, O. M. Imbila, and Titus M. Muthoka. 2015. “ Variation of Pollutant Levels in Vegetables: A Case Study of Kitale Municipality, Trans-Nzoia County, Kenya ”. African Journal of Education,Science and Technology (AJEST) 2 (2):pp 146-160. https://ajest.org/index.php/ajest/article/view/675.