Hallosh Khidhir, A. and Yahya Al-Jarjees, A. (2007) “Filler Content Effects on the Ultrasonic Response of Composite Materials Using the Pulse-Echo Amplitude Technique”, Journal of Engineering and Sustainable Development, 11(1), pp. 29–44. Available at: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1700 (Accessed: 19 February 2025).