A, Dr. Sreedhar, and Dr. Shobha Prakash. 2012. “Cigarette Smoking As a Risk Factor For Periodontal Disease Severity: Cigarette Smoking As a Risk Factor For Periodontal Disease Severity”. National Journal of Integrated Research in Medicine 3 (2):161-64. https://doi.org/10.70284/njirm.v3i2.2016.