Saleh Al-Nuaimi, H.I. 2023. 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, 62, 1 (Jun. 2023), 299–318. DOI:https://doi.org/10.25130/tjaes.19.62.1.16.