Al-Dahhan, W., Hashim, H., Ibraheem, H., Yousif, E., & Hadi, H. M. (2018). Determination of Toxic Elements in Tobacco, Tobacco Smoke and Ash from Selected Imported Cigarettes Brands. Al-Nahrain Journal of Science, 21(4), 23-29. https://mail.anjs.edu.iq/index.php/anjs/article/view/1985