M. Qaro, Shams-Aldeen, and Zeki M. Akrawee. “Economic Evaluation Air Pollution Removal and Oxygen Production Based on I-Tree Program for Atrush Forest Kurdistan Region Of Iraq*”. Academic Journal of Nawroz University (AJNU), vol. 9, no. 1, Feb. 2020, https://journals.nawroz.edu.krd/files/article/view/906.