EZEUGWU INNOCENT ONYEBUCHI; OZOKO DANIEL CHUKWUEMEKA; DIKE ANSELM OBICHUKWU. Nitrogen Speciation in Regolith Aquifers at Enugu, Southeastern Nigeria. International Journal of Earth & Environmental Sciences (IJEES), [S. l.], v. 3, n. 1, p. 16–32, 2018. DOI: 10.58885/ijees.v8i1.16.eo. Disponível em: https://ijees.ielas.org/index.php/ijees/article/view/59. Acesso em: 22 apr. 2026.