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Baier, Edward J.
Remove constraint All Creators: Baier, Edward J.
All Creators
Diakun, R.
Remove constraint All Creators: Diakun, R.
Subject Topical
Coal miners--Diseases--Pennsylvania.
Remove constraint Subject Topical: Coal miners--Diseases--Pennsylvania.
Subject Topical
Lungs--Dust diseases.
Remove constraint Subject Topical: Lungs--Dust diseases.
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