Heavy Metals Pollution in Surface Water and Sediment of Lower Cross River System in Akwa Ibom State, Nigeria. Communication In Physical Sciences, [S. l.], v. 5, n. 2, p. 117–123, 2020. Disponível em: https://journalcps.com/index.php/volumes/article/view/328. Acesso em: 29 jun. 2026.