Ajit , Mandeep Bhadana , Gianender , Rinki Yadav. “Occupational Health Hazards of Welding Workers: Piping Industry Perspective”. International Journal of Emerging Trends in Science and Technology, Vol. 4, no. 09, Sept. 2017, pp. 6039-46, http://igmpublication.org/ijetst.in/index.php/ijetst/article/view/1413.