Saleh Al-Nuaimi, Haidar Ibrahim. “The Impact of Human Capital in Building Core Competences An Exploratory Study of the Opinions of a Sample of Managers Working in the Salah Al-Din Education Directorate Office”. Tikrit Journal of Administrative and Economic Sciences 19, no. 62, 1 (June 30, 2023): 299–318. Accessed September 20, 2026. https://www.tjaes.org/index.php/tjaes/article/view/815.