Y.Hachum, Dr.Ahmed, and Zahraa. GH. 2013. “Estimating Runoff Coefficient for Water Harvesting AtTal-Abta Area- Nineveh Governorate”. Al-Rafidain Engineering Journal (AREJ) 21 (5):41-52. https://doi.org/10.33899/rengj.2013.79414.