Samreen Bano, Khwaja Fahad Ahmad, Vikash Singh, Mohd Shadab, and Mohd Kashif Khan. “RETROFITTING OF COLUMN”. International Journal of Technical Innovation in Modern Engineering & Science, vol. 5, no. 13, Feb. 2019, p. -, https://ijtimes.com/index.php/ijtimes/article/view/3009.