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Author: Martin, John R., 1922-
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Language: English
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Audience: Adults
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Subject: Fluorspar industry -- Employees -- Diseases -- Newfoundland and Labrador -- St. Lawrence.
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Subject: Miners -- Health and hygiene -- Newfoundland and Labrador -- St. Lawrence.
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Subject: Radon -- Carcinogenicity -- Newfoundland and Labrador -- St. Lawrence.
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Subject: Radon -- Toxicology -- Newfoundland and Labrador -- St. Lawrence.