“The Economic Foundation of Nupe Kingdom to 1800 A.D: A Survey of the Facilitating Factors”. LAPAI JOURNAL OF NIGERIA HISTORY 12, no. 2 (November 17, 2020): 89–116. Accessed October 5, 2025. https://ojs.ibbujournals.com.ng/index.php/ljnnhh/article/view/776.