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1Published 1913Subjects: “...Gases. http://id.loc.gov/authorities/subjects/sh85053380...”
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2Published 1912Subjects: “...Fire prevention. http://id.loc.gov/authorities/subjects/sh85048509...”
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3Published 1913Subjects: “...Coal mines and mining. http://id.loc.gov/authorities/subjects/sh85027364...”
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Government Document eBook