Columbia subject headings:
Harvard subject headings:
Coal miners--Medical care--United States--Finance.
Coal miners--Pensions--United States.
Survivors' benefits--United States.
United Mine Workers of America
Princeton subject headings:
Coal miners--Medical care--United States--Finance.
Coal miners--Pensions--United States.
Pension trusts--United States.
Survivors' benefits--United States.
United Mine Workers of America.