A Review of Ultrasonic Application on Non-destructive Testing Method for Concrete Structure. Jurnal Teknologi, [S. l.], v. 70, n. 3, 2014. DOI: 10.11113/jt.v70.3474. Disponível em: https://journals.utm.my/jurnalteknologi/article/view/3474.. Acesso em: 20 jul. 2024.