Medical care innovations of the United Mine Workers of America Welfare and Retirement Fund.
D003032:Coal Mining; D003191:Comprehensive Health Care; D005251:Fees, Medical; D006123:Group Practice; D005102:Health Expenditures; D007348:Insurance, Health; D007357:Insurance, Physician Services; D007750:Labor Unions; D011787:Quality of Health Care; D014481:United States