SHARIF, S.F.A. and ANJEL, H.A. 2021. AIR POLLUTION ESTIMATION IN ERBIL CITY CENTER USING BOX MATHEMATICAL MODEL. Journal of Duhok University. 23, 2 (Jan. 2021), 246-253. DOI:https://doi.org/10.26682/csjuod.2020.23.2.20.