Muhammed, Amina, Hazhir Karimi, Berivan Gharab, Sevar Neamat, and Karamreza Mirzaei. “Assessment of the Quality of the Environment in Duhok Province, Kurdistan Region of Iraq”. Journal of Civil Engineering Frontiers 1, no. 1 (August 30, 2020): 20-24. Accessed December 4, 2021. https://jocivilef.org/index.php/jocef/article/view/9.