Ahmed, D. Q. R., D. S. Kr. Sau, D. S. Kr. Kar, and D. P. Ch. Dhara. “The Effect of Marble Dust on Different Pulmonary Parameters in Marble Factory Workers: The Effect of Marble Dust on Different Pulmonary Parameters”. National Journal of Integrated Research in Medicine, vol. 2, no. 3, Sept. 2011, pp. 7-10, http://nicpd.ac.in/ojs-/index.php/njirm/article/view/1913.