T.Al-Aqtum, M. (1996) “Biological Characteristics of Smokers and Nonsmokers Among Males and Females in Nablus Area IN the West Bank”, Al-Balqa Journal for Research and Studies, 4(2), pp. 55–70. Available at: https://ajrs.ammanu.edu.jo/ojs/index.php/albalqajournal/article/view/531 (Accessed: 10 October 2026).