“Evaluation of the Smoking Factor in the Blood of Workers in Diyala State Company and Its Relationship to Heavy Metals (Lead, Nickel and Copper)”. Academic Science Journal 1, no. 1 (January 1, 2023): 107–121. Accessed June 29, 2025. https://acadscij.uodiyala.edu.iq/index.php/Home/article/view/50.