title: A few observations on some of the pneumoconioses with special emphasis on the radiographic manifestations of the large opacities.
mesh_terms: D003032:Coal Mining; D005260:Female; D006801:Humans; D007883:Legislation, Medical; D008875:Middle Aged; D011009:Pneumoconiosis / Q000000981:diagnostic imaging* / Q000517:prevention & control; D011859:Radiography; D014481:United States