M. A , Olayiwola, and Bernard Emmanuel. “ Determination of Heavy Metals Concentration in Vegetables Irrigated With Water from Industrial Streams in Kano State. ”. African Journal of Education,Science and Technology (AJEST), vol. 3, no. 1, Jan. 2016, pp. Pg 184-189, http://ajest.org/index.php/ajest/article/view/586.