HAMED, F. S., & HAMED, A. A. B. A. A. G. (2008). Policies of Architectural Conservation in Ancient Places Case study: Historical Citadel of Erbil. Nahrain University College of Engineering Journal, 11(3), 564-571. https://oldjournal.eng.nahrainuniv.edu.iq/index.php/main/article/view/556