Ezebunanwa, A. C., J. I. Eronin, V. Okorie, E. C. Mbagwu, and N. A. Uchenna. “Facies Analysis of Eocene Sediment of Umuahia Area, Southeastern Nigeria”. Journal of Geography, Environment and Earth Science International, Vol. 23, no. 4, Oct. 2019, pp. 1-22, doi:10.9734/jgeesi/2019/v23i430174.