Chinda, B. and Yunus, M.M. (2019) “Investigation on Pesticide Residue Levels and Heavy Metal Concentrations in Zea-Mays and Oryza Sativa Grains in Biu Area”, International Journal of Science for Global Sustainability, 5(1), p. 7. Available at: https://www.fugus-ijsgs.com.ng/index.php/ijsgs/article/view/157 (Accessed: 4 October 2025).