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Creator Personal Names
Kerr, Lorin E., 1909-
Remove constraint Creator Personal Names: Kerr, Lorin E., 1909-
Subject Topical
Chest--Diseases.
Remove constraint Subject Topical: Chest--Diseases.
Subject Topical
Coal miners--Dust diseases--Prevention and control.
Remove constraint Subject Topical: Coal miners--Dust diseases--Prevention and control.
Subject Topical
Industrial productivity--United States.
Remove constraint Subject Topical: Industrial productivity--United States.
Subject Topical
Pneumoconiosis.
Remove constraint Subject Topical: Pneumoconiosis.
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