Hallosh Khidhir A, Yahya Al-Jarjees A. Filler Content Effects on the Ultrasonic Response of Composite Materials Using the Pulse-Echo Amplitude Technique. J. eng. sustain. dev. 2007;11(1):29-44. Accessed February 5, 2025. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1700