Katie, H. N., & Al-Baldawi, A. A. K. H. (2019). Management efficiency and its impact on managing the aviation insurance portfolio: An empirical study at the National Insurance Company in Iraq. Journal of Human Sport and Exercise, 14(5proc), S2304-S2317. Retrieved from https://www.jhse.ua.es/article/view/2019-v14-n5-proc-management-efficiency-aviation-insurance-portfo