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Creator Personal Names
McBride, W. Wayne.
Remove constraint Creator Personal Names: McBride, W. Wayne.
Creator Personal Names
Pendergrass, Eugene Percival, 1895-
Remove constraint Creator Personal Names: Pendergrass, Eugene Percival, 1895-
Subject Topical
Coal mines and mining--Pennsylvania.
Remove constraint Subject Topical: Coal mines and mining--Pennsylvania.
Subject Topical
Pneumoconiosis--Diagnosis.
Remove constraint Subject Topical: Pneumoconiosis--Diagnosis.
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