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1. U.S. Department of Labor. Occupational Safety and Health Administration OSHA 3151-12R
2003. available at: http://www.osha.gov/Publications/osha3151.html
2. Ramazzini B. Diseases of Workers. Thunder Bay, Canada: OH&S Press; 1993:261-263. Wright WC, translator.
3. Pouryaghoub G, Mehrdad R, Mohammadi S. Interaction of smoking and occupational noise exposure on hearing loss: a cross-sectional study. BMC Public Health 2007; 7:137.
4. Ologe FE, Olajide TG, Nwawolo CC et al, Deterioration of noise-induced hearing loss among bottling factory workers. J Laryngol Otol 2008 Aug; 122(8):786-94.
5. Rom William N. Environmental and Occupational Medicine, 4th Edition: 2007, chapter 85: 1296.
6. Criteria for a Recommended Standard: Occupational Noise Exposure. NIOSH Publication No. 98- 126. 1998. Available at: http://www.cdc.gov/niosh/docs/98-126/chap3.html. Accessed in 29 March 2012.
7. Talbott EO, Findlay RC, Kuller LH, Lenkner LA, Matthews KA, Day RD, et al. Noise-induced hearing loss: a possible marker for high blood pressure in older noise-exposed populations. J Occup Environ Med. 1990; 32(8):690-7.
8. Rosenstock L, Cullen MR, Brodkin CA. Textbook of Clinical Occupational and Environmental Medicine. W B Saunders; 2005:896-97.
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10. Mohammed Rashaad Hansia and David Dickinson.Hearing protection device usage at a South African gold mine.Occupational Medicine 2010; 60:72-74.
11. Taha AZ. Knowledge and practice of preventive measures in small industries in Al- Khobar. Saudi Med J 2000 Aug; 21(8):740-745.
12. Maisarah SZ, Said H. The noise exposed factory workers: the prevalence of sensorineural hearing loss and their use of personal hearing protection devices. Med J Malaysia 1993; 48: 280-285.
13. Kamal AA, Sayed GM, Hussan MH et al. Usage of personal protective devices among Egyptian industrial workers. Am J ind med 1988; 13:707-716.
14. Oloqe FE, Akande TM, Olajide TG. Noise exposure, awareness, attitudes and use of hearing protection in a steel rolling mill in Nigeria. Occup Med (Lond) 2005; 55(6):487-489.
