1. Ultrasonics
2. “Codes and Standards Bodies Involved in NDT Industry,” ASNT, www.asnt.org/MajorSiteSections/NDT-Resource-Center/Codes_and_Standards/Codes_and_Standard_ Bodies.aspx (accessed Jan. 20, 2018)
3. “Analysis and Support Initiative for Structural Technology (ASIST); Delivery Order 0016: USAF Damage Tolerant Design Handbook: Guidelines for the Analysis and Design of Damage Tolerant Aircraft Structures,”;Miedlar,2003
4. 40 years of progress in NDT – History as a Guide to the Future;Farley;Proc. 40th Annual Review of Progress in Quantitative Nondestructive Evaluation, AIP Conf. Proc.,2014
5. Ultrasonic Testing of Materials