“X-ray Radiographic Study of Simulated Voids –like Defects in Al -Castings and Welded Joints in Steel”, ANJS, vol. 16, no. 2, pp. 99–103, Jun. 2013, Accessed: Apr. 29, 2024. [Online]. Available: https://anjs.edu.iq/index.php/anjs/article/view/670