UMOREN, I. U.; ONIANWA, P. . C. Concentration and Distribution of Some Heavy Metals in Urban Soils of Ibadan, Nigeria. Biological Sciences - PJSIR, [S. l.], v. 48, n. 6, p. 397–701, 2005. Disponível em: https://v2.pjsir.org/index.php/biological-sciences/article/view/1432. Acesso em: 24 nov. 2024.