“A Survey Study on Some Sudanese Desert Sheep Management System in Gezira, Sinnar and Blue Nile States”. The Sudan Journal Of Animal Production المجلة السودانية للانتاج الحيواني, vol. 23, no. 23, June 2021, pp. 11-20, https://sud-jap.sd/Journal/index.php/sjap/article/view/9.