INVESTIGATION OF THE VARIATION IN ELECTRICAL RESISTIVITY VALUES OF EARTH MATERIALS WITH DEPTH AT NARAYI AREA OF KADUNA STATE, NIGERIA. FJS [Internet]. 2020 Apr. 14 [cited 2025 Sep. 11];4(1):321-32. Available from: https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/51