SilicosisSilicon DioxideMiningDyspneaSilicotuberculosisDustQuartzOccupational ExposureOccupational DiseasesGoldCoal MiningConstruction MaterialsRadiography, ThoracicRespiration DisordersRespiratory SoundsLungRespiratory Function TestsMaximum Allowable ConcentrationCoughPneumoconiosisInhalation ExposureMediastinal EmphysemaUnited States Occupational Safety and Health AdministrationNew JerseyUraniumTinAsthmaSculptureExtraction and Processing Industry