Hassan, M., R. Carter, and K. Rushton. “Groundwater Modelling With Limited Data: A Case Study of Yobe River Basin, North East Nigeria”. ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT, Vol. 4, Oct. 2004, pp. 51-62, https://azojete.com.ng/index.php/azojete/article/view/323.