Filler Content Effects on the Ultrasonic Response of Composite Materials Using the Pulse-Echo Amplitude Technique. Journal of Engineering and Sustainable Development, [S. l.], v. 11, n. 1, p. 29–44, 2007. Disponível em: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1700.. Acesso em: 15 may. 2024.