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Creator Personal Names
Lieben, Jan.
Remove constraint Creator Personal Names: Lieben, Jan.
Creator Personal Names
McBride, W. Wayne.
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Subject Topical
Coal mines and mining--Pennsylvania.
Remove constraint Subject Topical: Coal mines and mining--Pennsylvania.
Subject Topical
Lungs--Dust diseases.
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Subject Topical
Pneumoconiosis--Pennsylvania.
Remove constraint Subject Topical: Pneumoconiosis--Pennsylvania.
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