P M, J., V. G. P G, and P. Kumar. “Etiological Factors of Congenital Hearing Loss in Children – A High Risk Registerbased Study”. Journal of All India Institute of Speech and Hearing, Vol. 32, no. 1, Dec. 2013, pp. 205-10, http://203.129.241.91/jaiish/index.php/aiish/article/view/1355.