Ezeugwu Innocent Onyebuchi, Ozoko Daniel Chukwuemeka, and Iyi Emmanuel Chibuike. “SULFUR SPECIATION IN REGOLITH AQUIFERS AT ENUGU, SOUTHEASTERN NIGERIA”. International Journal of Earth & Environmental Sciences (IJEES), vol. 1, no. 1, Nov. 2016, pp. 15-34, doi:10.58885/ijees.v1i1.15.eo.