A. Abdullah, H. and H. Ramadan, A. 2021. The Structural Foundations for Psychological Capital and its Role in the Constructive Foundation of Intellectual Capital-Analytical research for a sample opinions of engineers in the North Oil Company - Salah Al-Din branch. TANMIYAT AL-RAFIDAIN. 40, 129 (Mar. 2021), 203–222. DOI:https://doi.org/10.33899/tanra.2021.129396.1072.