Amran, T. S. T. “SUBSURFACE INVESTIGATION USING NON-DESTRUCTIVE TESTING (NDT) METHODS”. JOURNAL of NUCLEAR and Related TECHNOLOGIES 17, no. 2 (December 21, 2020): 34-40. Accessed July 7, 2025. http://jnrtmns.net/index.php/jnrt/article/view/186.