Asuquo, FE, and JP Udoh. “Patterns of Total Hydrocarbon, Copper and Iron in Some Fish from Cross River Estuary, Nigeria”. West African Journal of Applied Ecology 3, no. 1 (September 1, 2009). Accessed August 11, 2026. https://www.ajol.info/index.php/wajae/article/view/45580.