OGWAH, C.; EYANKWARE, M. Hydrogeochemical processes in groundwater resources located around abandoned Okpara coal, Enugu SE. Nigeria. Bangladesh Journal of Scientific and Industrial Research, [S. l.], v. 55, n. 4, p. 245–252, 2020. DOI: 10.3329/bjsir.v55i4.50960. Disponível em: https://www.banglajol.info/index.php/BJSIR/article/view/50960. Acesso em: 24 may. 2024.