HYDROGEOCHEMICAL AND BIOPHYSICAL CHARACTERIZATION OF GROUNDWATER IN EASTERN NIGERIA: A CASE STUDY OF ONITSHA AND ENVIRONS. Nigerian Journal of Technology, [S. l.], v. 34, n. 4, p. 875–882, 2015. DOI: 10.4314/njt.344.1022. Disponível em: https://nijotech.com/index.php/nijotech/article/view/1022. Acesso em: 16 apr. 2026.