Toma, Janan Jabbar. “Water Quality Index for Assessment of Water Quality of Duhok Lake, Kurdistan Region of Iraq”. Journal of Advanced Laboratory Research in Biology 3, no. 3 (July 1, 2012): 119–124. Accessed September 25, 2021. https://e-journal.sospublication.co.in/index.php/jalrb/article/view/111.