I. Shrestha, B. L. Shrestha, M. Pokharel, R. C. M. Amatya, and D. R. Karki, “Prevalance of Noise Induced Hearing Loss among Traffic Police Personnel of Kathmandu Metropolitan City”, Kathmandu Univ. Med. J., vol. 9, no. 4, pp. 274–278, Jun. 2012, doi: 10.3126/kumj.v9i4.6343.