Al-Tayyar, Taha, طه, Abdul mohsin Shihab, and عبد. 2005. “Seasonal Variations in Some Elements of the Quality of the Tigris Waters Between Qaber Abd and Al-Qayara”. Journal of Education and Science (JES) 17 (1):29-39. https://doi.org/10.33899/edusj.2005.80877.