Goni, I., W. Edmunds, and F. Adeniji. “Estimating Groundwater Recharge for Sustainable Management in the Nigerian Sector of the Chad Basin”. ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT, Vol. 4, Oct. 2004, pp. 78-88, https://azojete.com.ng/index.php/azojete/article/view/326.