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Reger, Robert B.
Remove constraint All Creators: Reger, Robert B.
All Creators
Shoub, Earle P.
Remove constraint All Creators: Shoub, Earle P.
Subject Topical
Coal miners--Diseases--United States.
Remove constraint Subject Topical: Coal miners--Diseases--United States.
Subject Topical
Lungs--Dust diseases.
Remove constraint Subject Topical: Lungs--Dust diseases.
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