ENI, D. Imoke; LEKAM, Ibiang, J.; DIGHA, Opaminola. N. Vulnerability of Groundwater Quality to Septic Systems in Calabar Municipality, Nigeria. International Journal of Social Sciences, [S. l.], v. 10, n. 2, p. 74–88, 2016. Disponível em: https://ijss.com.ng/index.php/home/article/view/22. Acesso em: 13 sep. 2025.