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McBride, W. Wayne.
Remove constraint All Creators: McBride, W. Wayne.
Subject Topical
Coal mines and mining--Pennsylvania.
Remove constraint Subject Topical: Coal mines and mining--Pennsylvania.
Subject Topical
Lungs--Dust diseases--Diagnosis.
Remove constraint Subject Topical: Lungs--Dust diseases--Diagnosis.
Subject Topical
Pneumoconiosis--Diagnosis.
Remove constraint Subject Topical: Pneumoconiosis--Diagnosis.
Subject Topical
Pneumoconiosis--Research.
Remove constraint Subject Topical: Pneumoconiosis--Research.
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