HAMA AMIN, D. A. . Air pollution in Kalar City by carbon monoxide and carbon dioxide gases. Halabja University Journal, [S. l.], v. 5, n. 1, p. 478–491, 2020. DOI: 10.32410/huj-10283. Disponível em: https://huj.uoh.edu.iq/index.php/HUJ/article/view/huj-10283. Acesso em: 1 jul. 2022.