Adamu, D. J. M., and D. Enock. “Assessment of Some Heavy Metals in Leafy Vegetables Grown in the Vicinity of Dump Site Along River Benue, Mubi Road, Yola, Nigeria”. The International Journal of Science & Technoledge, vol. 5, no. 8, Aug. 2017, http://internationaljournalcorner.com/index.php/theijst/article/view/123606.