Shuaib-Babata, Y. L., A. J. Abegunde, and I. O. Ambali. “Evaluation of Chemical and Physico-Mechanical Properties of Ado-Ekiti Natural Moulding Sands for Foundry Applications”. ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT, Vol. 13, no. 6, Dec. 2017, pp. 718-33, https://azojete.com.ng/index.php/azojete/article/view/657.