Ravindran, V.K., and B.C. Bhaumik. “Dry-Coupled Pulse Echo Ultrasonic Inspection Methodology for Solid Graphite Products of Rocket Boosters”. Defence Science Journal 52, no. 1 (January 1, 2002): 27-32. Accessed April 26, 2024. https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/2145.