http://pec.lib.wvu.edu/record/P165841971Breathlessness in southern Appalachian coal miners.Journal article reprint from: <em>Respiratory Care</em>, &lt;v.16:no.2 (1971:Mar/Apr.)&gt;.Rasmussen, Donald L.Lungs--Dust diseases--Research.Chest--Diseases--Research.Pneumoconiosis--Appalachian Region--Research.Coal miners--Diseases--Appalachian Region--Research.Respiratory organs--Research.14256