Al-Mudheffer, Zehraa Abdul-Aali, and Ameer Taki Zieny. “Spirometric Results of Combined Obstructive-Restrictive Lung Disease in Emphysema”. Kufa Journal for Nursing Sciences, vol. 3, no. 3, Dec. 2013, pp. 24-29, doi:10.36321/kjns.vi20133.2512.