Yahya Dhannoun, H., هشام, Mahmood, H. and حازم 2025. The Use of Factor Analysis in Defining Factors Responsible for the Variation of the Concentrations of Dissolved Major Ions in Tigris River Water from Fishkabur to Baghdad. Iraqi National Journal of Earth Science (INJES). 19, 1 (Jun. 2025), 1–18. DOI:https://doi.org/10.33899/earth.2019.170268.