Yasir Ahmed khudhair, Sabbar Abdullah Salih, and Ghazi Atiya Zarraq. 2021. “Applying a Mathematical Model to Simulate the Ground Water Reservoir in Al-Alam Area Northeast Tikrit City Iraq”. Tikrit Journal of Pure Science 26 (3):60-66. https://doi.org/10.25130/tjps.v26i3.143.