http://pec.lib.wvu.edu/record/P182401974Participating clinics, doctors and hospitals serving beneficiaries of the United Mine Workers of America Welfare and Retirement Fund.Pamphlet. "Serving Fund beneficiaries in UMWA Districts 19, 28, and 30." "January, 1974."United Mine Workers of America. Welfare and Retirement Fund. Medical, Health, and Hospital Service. Knoxville Area Medical Office.Labor union welfare funds--United States.14256