M. Ahmed, Abdel Ghaffar. “Ethnicity and Scale in Pastoral-Sedentary Relations: Early Barth and His Relevance to Sudan.1”. IJRDO - Journal of Social Science and Humanities Research 2, no. 8 (August 31, 2017): 09-18. Accessed December 24, 2024. http://webdisk.ijrdo.org/index.php/sshr/article/view/812.