[57] NIOSH [2003]. Silica, crystalline, by XRD (respirable): Method 7500. In: NIOSH Manual of Analytical Methods, 4th ed., 3rd Suppl. Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Serivce, Centers for Desease Control and Prevention, National Institute for Occupational Safety and Health, Publication No. 03-127.
[58] OSHA [1996]. Quartz and cristobalite in workplace atmospheres: Method ID-142. Salt Lake City, UT: U.S. Department of Labor, Occupational Safety and Health Administration.
[59] MSHA [1999]. X-ray diffraction determination of quartz and cristobalite in respirable mine dust: Method P-2. Pittsburgh, PA: U.S. Department of Labor, Mine Safety and Health Administration.
[60] HSE [1988]. Quartz in respirable airborne dusts: Laboratory method using X-ray diffraction (direct method): MDHS 51 /2. In: Methods for the determination of hazardous substances. London: Health and Safety Executive, ISBN 0 7176 0255 9.
[61] Smith DK [1991]. Evaluation of the detectability and quantification of respirable crystalline silica by X-ray powder diffraction methods. Presentation at the Chemical Manufacturers Association symposium Issues and Controversy: The Measurement of Crystalline Silica, Arlington, VA.
[62] Hurst VJ, Schroeder PA and Styron RW [1997]. Accurate quantification of quartz and other phases by powder X-ray diffractometry. Anal Chim Acta 337:233-252.
[63] NIOSH [2003]. Silica, crystalline, by IR, (KBr pellet): Method 7602. In: NIOSH Manual of Analytical Methods, 4th ed., 3rd suppl. Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Serivce, Centers for Desease Control and Prevention, National Institute for Occupational Safety and Health, Publication No. 03-127.
[64] NIOSH [2003]. Quartz in coal mine dust, by IR (redeposition): Method 7603. In: NIOSH Manual of Analytical Methods, 4th ed., 3rd suppl. Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Serivce, Centers for Desease Control and Prevention, National Institute for Occupational Safety and Health, Publication No. 03-127.
[65] MSHA [1994]. Infrared determination of quartz in respirable coal mine dust: Method P-7. Pittsburgh, PA: U.S. Department of Labor, Mine Safety and Health Administration.
[66] HSE [1988]. Quartz in respirable airborne dusts: Laboratory method using infrared spectroscopy (direct method): MDHS 37. In: Methods for the determination of hazardous substances. London: Health and Safety Executive, ISBN 0 7176 02087.
[67] HSE [1988]. Quartz in respirable airborne dusts: Laboratory method using infrared spectroscopy (KBr disc technique): MDHS 38. In: Methods for the determination of hazardous substances. London: Health and Safety Executive, ISBN 0 7176 02095.
[68] Anderson PL [1975]. Free silica analysis of environmental samples - A critical literature review. Am Ind Hyg Assoc J 36:767-778.
[69] Shaw L [2002]. Personal communication. Occupational and Environmental Health Laboratory, McMaster University, Hamilton, Ontario, CA.
[70] Gadson JA, ed. [1975]. Infrared spectra of minerals and related inorganic compounds. London: The Butterworth Group.
[71] NIOSH [2003]. Silica, crystalline, by VIS: Method 7601. In: NIOSH Manual of Analytical Methods, 4th ed., 3rd suppl. Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 03-127.
[72] Talvitie NA [1964]. Determination of free silica: gravimetric and spectrophotometric procedures applicable to airborne and settled dusts. Amer Ind Hyg Assoc J 25:169-178.
[73] Talvitie NA and Hyslop F [1958]. Colorimetric determination of siliceous atmospheric contaminants. Amer Ind Hyg Assoc J 19:54-58.
