HOWARD, Ibigoni Clinton; OLULU, Briggs Amonia. Metal Pollution Indices of Surface Sediment and Water from the Upper Reaches of Sombriero River, Niger Delta, Nigeria. Our Nature, [S. l.], v. 10, n. 1, p. 206–216, 2013. DOI: 10.3126/on.v10i1.7783. Disponível em: https://www.nepjol.info/index.php/ON/article/view/7783. Acesso em: 10 feb. 2025.