Ayeni, Samuel Olalekan. “Spatial Analysis and Vulnerability Mapping of Bitumen Deposit In Okitipupa Local Government Area of Ondo State”. African Journal on Land Policy and Geospatial Sciences 5, no. 5 (November 30, 2022): 1104–1115. Accessed November 8, 2025. https://revues.imist.ma/index.php/AJLP-GS/article/view/32599.