Jasim, Sedeeq Mustafa, and Farah Abdul Qadir Faleh. 2019. “Modeling and Representing the Multiple Compound Population Pyramid for the Population of Salah Al - Din Governorate, 2016”. Journal of Tikrit University for Humanities 26 (4):233-52. https://doi.org/10.25130/jtuh.26.4.2019.12.