Umara, B., M. Yaji, and A. Fannami. “Groundwater Contamination in Damaturu, Nigeria”. ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT 4 (October 1, 2004): 45-50. Accessed November 22, 2024. https://azojete.com.ng/index.php/azojete/article/view/322.