علي خضرسالار. “Historical Stages of the Koeppen Climate Classification and Trying to Modify It.”. Al-Adab Journal (ISSN: 1994473X) 1, no. 124 (September 15, 2018): 459-484. Accessed November 20, 2019. http://aladabj.uobaghdad.edu.iq/index.php/aladabjournal/article/view/102.