IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-13-8-57786 Original Research Paper Effect Of Covid -19 Pandemic On The Education Of Post Graduate Students In The Field Of Periodontology In North India Sumanpreet Kaur Dr. Dr Divya Saxena Dr. Dr. Gaurav Pandav Dr. August 2024 13 8 01 02