The Role of Job Enrichment in Building Differentiation Strategy Service: Analytical Exploratory Study of the Views of a Sample of the General Managers and Heads of Departments and Officials of the People in the General Establishment of Civil Aviation. JAFS [Internet]. 2019 Feb. 28 [cited 2024 May 3];10(31). Available from: https://jpgiafs.uobaghdad.edu.iq/index.php/JAFS/article/view/374