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Creator Personal Names
Schrenk, H. H. (Helmuth Herman), 1902-
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All Creators
Brown, Carlton E.
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All Subjects
Coal miners--Diseases.
Remove constraint All Subjects: Coal miners--Diseases.
All Subjects
Dust control.
Remove constraint All Subjects: Dust control.
Subject Topical
Coal miners--Diseases.
Remove constraint Subject Topical: Coal miners--Diseases.
Subject Topical
Dust control.
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Subject Topical
Lungs--Dust diseases.
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