NDT-Defect Detection on Concrete using Ultrasonic: A Review: Farah Aina Jamal Mohamad, Ruzairi Abdul Rahim, Nasarudin Ahmad, Juliza Jamaludin, Sallehuddin Ibrahim, Mohd Hafiz Fazalul Rahiman, Nur Arina Hazwani Samsun Zaini, Navintiran, Syarfa Najihah Raisin, Fatinah Mohd Rahalim. TSSA [Internet]. 2021 Jun. 13 [cited 2024 Jul. 4];4(1):1-7. Available from: https://tssa.my/index.php/jtssa/article/view/140