Bhusal, Chop Lal, RPS Guragain, and RP Shrivastav. “Frequency Dependence of Hearing Loss With Perforations”. Journal of Nepal Medical Association 46, no. 168 (October 1, 2007). Accessed May 18, 2024. http://jnma.com.np/jnma/index.php/jnma/article/view/263.