%0 Journal Article %T Performance Comparison of Four Portable FTIR Instruments for Direct-on-Filter Measurement of Respirable Crystalline Silica %A Ashley, Elizabeth, L %A Cauda,, Emanuele %A Chubb, Lauren, G %A Tuchman, Donald, P %A Rubinstein, Elaine, N %J Annals of Work Exposures and Health (formerly Annals Of Occupational Hygiene) %V 64 %N 5 %P 536-546 %@ 2398-7308 %D 2020-06-24 %I British Occupational Hygiene Society %~ DeepDyve