Pneumoconiosis and respiratory symptoms in miners at eight collieries.
D003032:Coal Mining; D004194:Disease; D006801:Humans; D011009:Pneumoconiosis / Q000706:statistics & numerical data*; D012120:Respiration Disorders; D012137:Respiratory System; D012140:Respiratory Tract Diseases
COAL MINING; PNEUMOCONIOSIS/statistics; RESPIRATORY SYSTEM/diseases