B. B. Bandyopadhyay , Prof. Roumi Deb. “Development of Railways During the British Raj in India and Its Demographic Impact ”. International Journal of Emerging Trends in Science and Technology, Vol. 4, no. 08, Aug. 2017, pp. 5828-37, https://igmpublication.org/ijetst.in/index.php/ijetst/article/view/1342.