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In 2006 - Toronto, Canada 958 downloads
clayton-gawn.pdf
Relative Performance of a Range of Filtering Facepieces and Surgical Masks Against Ambient Particles, an Artificial Saliva Aerosol and an Attenuated Strain of Influenza Virus
Mike Clayton and Jonathan Gawn
Health and Safety Laboratory, Harpur Hill, Buxton SK17 9JN, UK