Iyyappan, P. Sri, and P. Shantha Kumari. “A Study On Working Condition of Operating Employees in Southern Railway With Reference to Chennai Division”. International Journal of Recent Advances in Multidisciplinary Topics, vol. 2, no. 3, Mar. 2021, pp. 15-20, https://journals.ijramt.com/index.php/ijramt/article/view/562.