Filtering Face Piece (dust mask) 1 : A negative-pressure particulate respirator with a filter as an integral part of the face piece or with the entire face piece composed of the filtering medium
Environmental Health and Safety, Glossary, University of Chicago, Illinois, USA 2010. http://safety.uchicago.edu/tools/glossary.shtml, (Ergo - Amer) {753}
University of California (Environmental Health & Safety), Safety & Industrial Hygiene Glossary of Terms, Riverside, CA, USA 2010. http://ehs.ucr.edu/safety/glossary.html, (IndHygS - Amer) {500}