D. Q. R. Ahmed, 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”, Natl J Integr Res Med, vol. 2, no. 3, pp. 7–10, Sep. 2011.