Usman, Muhammad, Madu Gadaka, and Abubakar Maazu. “Evaluation of Some Toxic Heavy Metals in Rice and Beans Samples Cultivated in Yobe State, Nigeria”. East African Journal of Health and Science 3, no. 1 (August 28, 2021): 145-151. Accessed August 24, 2025. https://journals.eanso.org/index.php/eajhs/article/view/396.