title: Chronic nonspecific diseases of the lungs in grain elevator workers.
mesh_terms: D000328:Adult; D002908:Chronic Disease; D004391:Dust; D002523:Edible Grain; D006801:Humans; D008171:Lung Diseases / Q000453:epidemiology* / Q000209:etiology; D008875:Middle Aged; D009784:Occupational Diseases / Q000453:epidemiology* / Q000209:etiology
chemical_list: D004391:Dust