A. Bubu, C. P. Ononugbo, and G. O. Avwiri. “Determination of Heavy Metal Concentrations in Sediment of Bonny River, Nigeria”. Archives of Current Research International 11, no. 4 (January 19, 2018): 1–11. Accessed October 16, 2025. https://www.journalacri.com/index.php/ACRI/article/view/190.