G, M. M. ., L. J. . O, M. . J., and W. V. . W. “DETERMINATION OF LEVELS OF ORGANOPHOSPHORUS PESTICIDE RESIDUES IN KALES, TOMATOES AND FRENCH BEANS FROM MERU COUNTY, KENYA BY GC-MS”. African Journal of Emerging Issues, vol. 1, no. 10, Oct. 2019, pp. 20-29, https://ajoeijournals.org/sys/index.php/ajoei/article/view/59.