B. Na, D. V. K., D. S. K. R, D. P. B, D. J. Muthu, and D. S. K. “Prevalence of Periodontal Disease Among Coal Mine Workers in Tamilnadu: Life Sciences-Health”. International Journal of Life Science and Pharma Research, vol. 12, no. SP25, Oct. 2022, pp. L79-L85, doi:10.22376/ijpbs/lpr.2022.12.6.SP25.L79-85.