"Changes in ventilatory function in coal miners after a work shift. "; "O'Brien, Richard J.", "Burgess, Dean B.", "Hankinson, John L.", "Lapp, N. LeRoy."; "Pneumoconiosis--Research.", "Respiratory organs--Research.", "Lungs--Dust diseases--Research.", "Coal miners--Diseases--Research."; "O'Brien, Richard J.", "Burgess, Dean B.", "Hankinson, John L.", "Lapp, N. LeRoy."; "1972"; "Journal article reprint from: Archives of Environmental Health, v.24 (1972:Mar.). "; ""; "P16571"; "pec"; "Coal miners--Diseases--Research.", "Lungs--Dust diseases--Research.", "Respiratory organs--Research.", "Pneumoconiosis--Research."; "14256"; .