References
- National Institute for Occupational Safety and Health . 1974 . Criteria for a Recommended Standard … Occupational Exposure to Crystalline Silica , DHEW (NIOSH) Doc. No. 75–120 Washington, DC
- National Institute for Occupational Safety and Health . 1984 . “ Method 7500—Silica, Crystalline, Respirable ” . In NIOSH Manual of Analytical Methods , 3rd Ed. , DHHS (NIOSH) Pub. No. 84–100 Edited by: Eller , P. M. Cincinnati
- National Institute for Occupational Safety and Health . 1984 . “ Method 7602–Silica, Crystalline (IR) ” . In NIOSH Manual of Analytical Methods , 3rd Ed. , DHHS (NIOSH) Pub. No. 84–100 Edited by: Eller , P. M. Cincinnati
- Lorberau , C. D. , Carsey , T. P. , Fischbach , T. and Mulligan , K. J. 1990 . Evaluation of Direct-on-filter Methods for the Determination of Respirable Alpha-Quartz . Appl. Occup. Environ. Hyg , 5 ( 1 ) : 27 – 35 .
- National Institute for Occupational Safety and Health . 1984 . Development of Respirable Pure Quartz and Cristobalite Calibration Standard Reference Materials with Known Particle Size Distribution Washington, DC Final Report of NIOSH Contract NIOSH-IA-80–36
- Foster , R. D. and Walker , R. F. 1984 . Quantitative Determination of Crystalline Silica in Respirable-size Dust Samples by Infrared Spectrophotometry . Analyst , 109 : 1117