Babagana, S. M., and S. Sharma. “GEOPHYSICAL CHARACTERIZATION OF AQUIFER SYSTEMS USING VERTICAL ELECTRICAL SOUNDING METHOD IN DEMSA, NORTHEAST NIGERIA”. International Journal of Research -GRANTHAALAYAH, vol. 8, no. 11, Dec. 2020, pp. 175-84, doi:10.29121/granthaalayah.v8.i11.2020.2379.