1. CDC TB Respiratory Protection Program in Health Care Facilities Administrator's Guide http://www.cdc.gov/niosh/docs/99-143/
2. CDC Interim Domestic Guidance on the Use of Respirator to Prevent the Transmission of SARS http://www.cdc.gov/ncidod/sars/respirators.htm
3. CDC Interim Recommendations for Facemask and Respirator Use to Reduce Novel Influenza a (H1N1) Virus Transmission http://www.cdc.gov/h1n1flu/masks.htm
4. Workplace protection factors for an N95 filtering facepiece respirator;Janssen;Journal of Occupational and Environmental Hygiene,2007
5. Workplace performance of an N95 respirator in a concrete block manusfacturing plant;Bidwell;Journal of the International Society for Respiratory Protection,2004