اهم العقبات التي تواجه المخطط الاساس. J. eng. sustain. dev. [Internet]. 2018 Sep. 1 [cited 2024 May 10];22(5):Ar 1-10. Available from: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/392