Concentration of lead and the proportion of sedimentary organic matter , clay minerals , non-clay minerals and soil gradation , City of Nasiriyah , Southern Iraq. Baghdad Science Journal, Iraq, Baghdad, v. 12, n. 1, p. 34–39, 2018. DOI: 10.21123/bsj.2015.12.1.34-39. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/2941.. Acesso em: 28 apr. 2024.