1. Indian Bureau of Mines. Indian Minerals Yearbook 2017. 56th ed. Nagpur: IBM;2018http://ibm.gov.in/writereaddata/files/12102018131542Slate_%20S_st%20and%20Other%20Dimension%202017.pdf. Accessed April 22 2019.
2. Directorate General of Mines Safety Ministry of Labour. “The mines act 1952”.http://www.dgms.net/ma_1952.pdf. Accessed March 20 2019.
3. Directorate General of Mines Safety Ministry of Labour. The Metalliferrous Mines Regulations 1961.http://www.dgms.gov.in/writereaddataUploadFile/Metalliferous%20Mines%20Regulation %201961.pdf. Accessed March 20 2019.
4. NIOSH Hazard Review. Health Effects of Occupational Exposure to Respirable Crystalline Silica. DHHS2002https://www.cdc.gov/niosh/docs/2002‐129/pdfs/2002‐129.pdf. Accessed March 15 2019.