M. Almousawi, Israa, Thikra H. Mathkor, Aessa A. Salih, Adnan H. Afaj, and Muthna A.A.Shanshal. “Statistical Analysis of Polycyclic Aromatic Hydrocarbons Concentrations at Baghdad City”. Al-Qadisiyah Journal of Pure Science 23, no. 1 (May 3, 2018): 122 - 138. Accessed May 4, 2024. https://journalsc.qu.edu.iq/index.php/JOPS/article/view/725.