Sheikh, Nadeem. “KNOWLEDGE, ATTITUDE AND PRACTICE SURVEY REGARDING NOISE-INDUCED HEARING LOSS IN AIR AND GROUND CREW OF PAKISTAN AIR FORCE BASE MASROOR”. Pakistan Armed Forces Medical Journal 69, no. 4 (August 27, 2019): 742-47. Accessed July 8, 2020. https://pafmj.org/index.php/PAFMJ/article/view/3192.