Bureau of Mines procedure for analysis of respirable dust from coal mines.
D003032:Coal Mining; D004391:Dust / Q000032:analysis*; D005374:Filtration; D006077:Government Agencies; D007883:Legislation, Medical; D008433:Mathematics; D008722:Methods; D008906:Mining; D009787:Occupational Medicine; D012822:Silicon Dioxide / Q000032:analysis; D013055:Spectrophotometry, Infrared; D014481:United States
D004391:Dust; D012822:Silicon Dioxide