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Creator Personal Names
Morgan, William Keith C.
Remove constraint Creator Personal Names: Morgan, William Keith C.
Subject Topical
Chest radiography.
Remove constraint Subject Topical: Chest radiography.
Subject Topical
Chest--Diseases.
Remove constraint Subject Topical: Chest--Diseases.
Subject Topical
Coal mines and mining--Appalachian Region.
Remove constraint Subject Topical: Coal mines and mining--Appalachian Region.
Subject Topical
Pneumoconiosis.
Remove constraint Subject Topical: Pneumoconiosis.
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