Elobied, G., 		Dafalla, A., 		A.Abdalla, A., 		Mohammed, I., 		Fadiel, A., & 		Abdalla, I.
2017 Dec  1.  Effect of production systems on the performance of dairy cows in the Gezira State, Sudan. المجلة الزراعية. [على الإنترنت] 15:2