Ezeugwu Innocent Onyebuchi, Ozoko Daniel Chukwuemeka, Dike Anselm Obichukwu. Nitrogen Speciation in Regolith Aquifers at Enugu, Southeastern Nigeria. ijees [Internet]. 2018 May 10 [cited 2026 Apr. 22];3(1):16-32. Available from: https://ijees.ielas.org/index.php/ijees/article/view/59