Adams, Fatimoh, Shettima Bukar, Mohammed Bukar, and B. Umdagas. “Mineralogical and Geotechnical Properties of Clay Minerals in Northern Borno, Nigeria”. European Journal of Engineering and Technology Research 5, no. 9 (September 10, 2020): 1062-1068. Accessed April 12, 2021. https://ejers.org/index.php/ejers/article/view/1767.