Heavy Metals and Refractory Organic Compounds in Khartoum State’s Groundwater Resources. European Journal of Engineering and Technology Research, [S. l.], v. 2, n. 8, p. 13–16, 2017. DOI: 10.24018/ejeng.2017.2.8.419. Disponível em: https://ej-eng.org/index.php/ejeng/article/view/419. Acesso em: 2 nov. 2025.