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Creator Personal Names
Beatty, J. A.
Remove constraint Creator Personal Names: Beatty, J. A.
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Coal mines and mining--Pennsylvania.
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Subject Topical
Chest--Diseases.
Remove constraint Subject Topical: Chest--Diseases.
Subject Topical
Coal miners--Diseases--Pennsylvania.
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Subject Topical
Lungs--Dust diseases.
Remove constraint Subject Topical: Lungs--Dust diseases.
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