Columbia subject headings:
Coal miners--Diseases--Congresses.
Lungs--Dust diseases--Congresses.
United States. Federal Mine Safety and Health Act of 1977--Congresses.
Harvard subject headings:
Coal miners--Diseases--Congresses.
Conference papers and proceedings.
Lungs--Dust diseases--Congresses
United States. Federal Mine Safety and Health Act of 1977--Congresses.
Princeton subject headings: