“اهم العقبات التي تواجه المخطط الاساس”, J. eng. sustain. dev., vol. 22, no. 5, pp. Ar 1–10, Sep. 2018, Accessed: May 10, 2024. [Online]. Available: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/392