Jasim, S.M. and Faleh, F.A.Q. 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 (Jun. 2019), 233–252. DOI:https://doi.org/10.25130/jtuh.26.4.2019.12.