Yusra Ihsan Sadeq, and Yaseen Othman Abdullah. “Estimating The Demand Function for Health Services (Civil and Governmental) For A Sampleof Hospitals in Erbil Governorate”. QALAAI ZANIST JOURNAL, vol. 8, no. 1, Mar. 2023, pp. 1041-6, doi:10.25212/lfu.qzj.8.1.40.