Hazarika, H. N., D. Bhuyan, S. C. Hazarika, and S. Addya. “Refractive Errors in Age Group Seven to Fifteen Years: North-East India Scenario”. International Journal Of Community Medicine And Public Health, vol. 4, no. 6, May 2017, pp. 1928-31, doi:10.18203/2394-6040.ijcmph20172151.