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All Creators
Baier, Edward J.
Remove constraint All Creators: Baier, Edward J.
All Creators
Crawford, George M.
Remove constraint All Creators: Crawford, George M.
Subject Topical
Chest--Diseases.
Remove constraint Subject Topical: Chest--Diseases.
Subject Topical
Coal miners--Diseases--Pennsylvania.
Remove constraint Subject Topical: Coal miners--Diseases--Pennsylvania.
Subject Topical
Pneumoconiosis.
Remove constraint Subject Topical: Pneumoconiosis.
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