NAFAGHA-LAWAL, M. O., et al. “SELECTED HEAVY METAL PROFILES IN FISHES SOLD IN OPEN MARKET, IN RIVERS STATE, NIGERIA”. Nigerian Journal of Fisheries, vol. 18, no. 2, Dec. 2021, pp. 2276-83, https://fisonjournal.org.ng/index.php/njf/article/view/115.