محمد حمید أوھام, and كاطع دواي انتھاء. “Study the Mechanical Behavior for Unsaturated Polyester Resin and Polystyrene”. Journal of Engineering and Sustainable Development 18, no. 5 (September 1, 2014): Ar 1–12. Accessed June 4, 2026. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/943.