%0 Journal Article %T SWeRF—A Method for Estimating the Relevant Fine Particle Fraction in Bulk Materials for Classification and Labelling Purposes %A Pensis, Ingeborg %A Luetzenkirchen, Frank %A Friede, Bernd %J Annals of Work Exposures and Health (formerly Annals Of Occupational Hygiene) %V 58 %N 4 %P 501-511 %@ 2398-7308 %D 2014-05-01 %I British Occupational Hygiene Society %~ DeepDyve