Chubado, Umaru, and Fatimah Dembo Bello. “The Influence of Geography on the Economy and Society of Yola Metropolis in the 19th Century”. African Journal of Humanities and Contemporary Education Research 18, no. 1 (February 3, 2025): 16–31. Accessed January 17, 2026. https://afropolitanjournals.com/index.php/ajhcer/article/view/593.