S. Singh and P. C. Diwan, “Retrofitting of an Existing Box Type Culvert using NDT and Analysis Tool Staad.Pro ”, Int J Sci Res Civil Engg, vol. 3, no. 3, pp. 26–31, Jun. 2019, Accessed: Jul. 03, 2024. [Online]. Available: https://ijsrce.com/index.php/home/article/view/IJSRCE19335