Babagana, Saleh Mustapha, and Satendra Sharma. 2020. “GEOPHYSICAL CHARACTERIZATION OF AQUIFER SYSTEMS USING VERTICAL ELECTRICAL SOUNDING METHOD IN DEMSA, NORTHEAST NIGERIA”. International Journal of Research -GRANTHAALAYAH 8 (11):175-84. https://doi.org/10.29121/granthaalayah.v8.i11.2020.2379.