Mahmoud, Mahmoud, and Mustafa Kasim. “Sediment Yield Problems in Khassa Chai Watershed Using Hydrologic Models”. Cihan University-Erbil Scientific Journal 3, no. 1 (May 13, 2019): 34-41. Accessed November 28, 2022. https://journals.cihanuniversity.edu.iq/index.php/cuesj/article/view/44.