altijani, hanan, and Iilyasse Ahmat. “The Trade Caravan Movement in Sub-Saharan Africa: A Study of the City of Abéché in Chad During the Twentieth Century”. Ibn Khaldoun Journal for Studies and Researches 6, no. 2 (February 1, 2026). Accessed June 27, 2026. https://www.benkjournal.com/benkj/article/view/1780.