Exposure trends in silica flour plants--United States, 1975-1986.
D000395:Air Pollutants, Occupational / Q000032:analysis*; D004391:Dust / Q000032:analysis; D006801:Humans; D008452:Maximum Allowable Concentration; D009314:National Institute for Occupational Safety and Health, U.S.; D011791:Quartz / Q000032:analysis*; D012822:Silicon Dioxide / Q000032:analysis*; D013997:Time Factors; D014481:United States
D000395:Air Pollutants, Occupational; D004391:Dust; D011791:Quartz; D012822:Silicon Dioxide