"Breathlessness in southern Appalachian coal miners."; "Rasmussen, Donald L."; "Chest--Diseases--Research.", "Coal miners--Diseases--Appalachian Region--Research.", "Lungs--Dust diseases--Research.", "Respiratory organs--Research.", "Pneumoconiosis--Appalachian Region--Research."; "Rasmussen, Donald L."; "1971"; "Journal article reprint from: Respiratory Care, <v.16:no.2 (1971:Mar/Apr.)>."; ""; "P16584"; "pec"; "Chest--Diseases--Research.", "Respiratory organs--Research.", "Lungs--Dust diseases--Research.", "Pneumoconiosis--Appalachian Region--Research.", "Coal miners--Diseases--Appalachian Region--Research."; "14256"; .