“INVESTIGATION OF THE VARIATION IN ELECTRICAL RESISTIVITY VALUES OF EARTH MATERIALS WITH DEPTH AT NARAYI AREA OF KADUNA STATE, NIGERIA”. FUDMA JOURNAL OF SCIENCES 4, no. 1 (April 14, 2020): 321–332. Accessed September 17, 2025. http://162.254.38.185/index.php/fjs/article/view/51.