2025. Estimation of the Zero-Truncated Poisson Regression Model using Iteratively Reweighted Least Squares Method with Application: and Some Distribution Properties. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ). 56, 1 (Jan. 2025), 258–264. DOI:https://doi.org/10.55562/jrucs.v56i1.23.