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You searched for: Creator Personal Names Baier, Edward J. Remove constraint Creator Personal Names: Baier, Edward J. Creator Personal Names Beatty, J. A. Remove constraint Creator Personal Names: Beatty, J. A. All Subjects Coal mines and mining--Pennsylvania. Remove constraint All Subjects: Coal mines and mining--Pennsylvania. Subject Topical Lungs--Dust diseases. Remove constraint Subject Topical: Lungs--Dust diseases. Subject Topical Respiratory organs--Obstructions. Remove constraint Subject Topical: Respiratory organs--Obstructions.

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