O. Ogbemudia, F., I. N. Bassey, O. Kekere, and E. D. Udo. “Concentrations of Heavy Metals in Three Commonly Used Medicinal Vegetables in Akwa- Ibom State”. Scientific Journal of Environmental Sciences 1, no. 2 (September 30, 2012): 21-29. Accessed February 24, 2025. https://sjournals.com/index.php/sjes/article/view/1274.