OKAH, Reminus; ADELE, Ruth C. Heavy metals analysis present in lamp black in two major sites of Port-Harcourt Polytechnic Rumuola Port-Harcourt. Direct Research Journal of Public Health and Environmental Technology, [S. l.], v. 10, n. 2, p. 9–11, 2025. Disponível em: https://journals.directresearchpublisher.org/index.php/drjphet/article/view/361. Acesso em: 25 may. 2026.