Aigba, Paul Igienekpeme, et al. “Application of Electrical Resistivity Tomography in Mapping the Lateral Extent of Ohia Kaolin Deposit in Umuahia Southeastern Nigeria”. Nigerian Journal of Physics, vol. 34, no. 4, Oct. 2025, pp. 60-70, https://doi.org/10.62292/10.62292/njp.v34i4.2025.431.