Azad, S. D. ., M. A. . Khan, M. I. . Ghaznavi, and S. . Khan. “Study of the Health Effects of Coal Mining on Coal Mine Workers of Baluchistan”. International Journal of Asian Social Science, vol. 3, no. 7, July 2013, pp. 1572-90, https://archive.aessweb.com/index.php/5007/article/view/2515.