Al ani, Ban, بان, Mahmmood Altai, and محمود. 2025. “Application of Poisson’s Hierarchical Regression Model to the Deaths of Covid-19 in Mosul City Hospitals”. IRAQI JOURNAL OF STATISTICAL SCIENCES 19 (2):1-14. https://rjps.uomosul.edu.iq/index.php/stats/article/view/20900.