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Bristol, Leonard J.
Remove constraint All Creators: Bristol, Leonard J.
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Dessen, Edgar L.
Remove constraint All Creators: Dessen, Edgar L.
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Morgan, William Keith C.
Remove constraint All Creators: Morgan, William Keith C.
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Reger, Robert B.
Remove constraint All Creators: Reger, Robert B.
Subject Topical
Coal miners--Diseases--Diagnosis.
Remove constraint Subject Topical: Coal miners--Diseases--Diagnosis.
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