Parvez, A., Siddiui, A.R., Khan, Z., Hasmi, S.F. and Khan, M.S. 2017. Prevalence of hearing impairment among primary school children in rural and urban areas of Aligarh, Uttar Pradesh, India. International Journal Of Community Medicine And Public Health. 3, 5 (Feb. 2017), 1273–1277. DOI:https://doi.org/10.18203/2394-6040.ijcmph20161397.