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Janssen L. L. & Nelson T. J. & Cuta K. T. (2007). Workplace protection factors for an N95 filtering facepiece respirator. Journal of Occupational and Environmental Hygiene, 4(9), 696–707.

Public Health Agency of Canada. (2001). Bacillus anthracis, Mycobacterium anthracis and Mycobacterium bovis. Material Safety Data Sheet (MSDS) Health Canada. Available at: www.phac-aspc.gc.ca/msds-ftss/index-eng.php#m. Accessed online 2010.

U.S. Department of Labor, Occupational Health and Safety Administration. Occupational Safety and Health Standards, Personal Protective Equipment. CFR 1910.134. Available at: http://63.234.227.130/pls/oshaweb/owadisp.show_document?p_id=12716&p_table=standards. Accessed online 2010.