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You searched for: All Creators Jacobson, George. Remove constraint All Creators: Jacobson, George. All Creators O'Brien, Richard J. Remove constraint All Creators: O'Brien, Richard J. All Creators Pendergrass, Eugene Percival, 1895- Remove constraint All Creators: Pendergrass, Eugene Percival, 1895- All Subjects Coal miners--Diseases--United States. Remove constraint All Subjects: Coal miners--Diseases--United States. Subject Topical Lungs--Dust diseases. Remove constraint Subject Topical: Lungs--Dust diseases.

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