“The Estimation the Size of Erosion in the Merka Sur Valley In Erbil”. ALUSTATH JOURNAL FOR HUMAN AND SOCIAL SCIENCES 226, no. 2 (September 1, 2018): 365–388. Accessed May 5, 2024. https://alustath.uobaghdad.edu.iq/index.php/UJIRCO/article/view/68.