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1Published 1940Subjects: “...Mineral industries. http://id.loc.gov/authorities/subjects/sh85085548...”
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2Published 1920Subjects: “...Asphalt. http://id.loc.gov/authorities/subjects/sh85008701...”
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3Published 1921Subjects: “...Gases. http://id.loc.gov/authorities/subjects/sh85053380...”
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4Published 1943Subjects: “...Chemicals. http://id.loc.gov/authorities/subjects/sh85022963...”
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Government Document eBook -
5Published 1943Subjects: “...Law. http://id.loc.gov/authorities/subjects/sh85075119...”
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Government Document eBook -
6Published 1943Subjects: “...Mines and mineral resources. http://id.loc.gov/authorities/subjects/sh85085614...”
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Government Document eBook -
7Published 1924Subjects: “...Industrial hygiene. http://id.loc.gov/authorities/subjects/sh85065884...”
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8Published 1925Subjects: “...Industrial hygiene. http://id.loc.gov/authorities/subjects/sh85065884...”
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9Published 1926Subjects: “...Industrial hygiene. http://id.loc.gov/authorities/subjects/sh85065884...”
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10Published 1927Subjects: “...Industrial hygiene. http://id.loc.gov/authorities/subjects/sh85065884...”
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11Published 1928Subjects: “...Industrial hygiene. http://id.loc.gov/authorities/subjects/sh85065884...”
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12Published 1929Subjects: “...Industrial hygiene. http://id.loc.gov/authorities/subjects/sh85065884...”
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13Published 1930Subjects: “...Industrial hygiene. http://id.loc.gov/authorities/subjects/sh85065884...”
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14Published 1931Subjects: “...Industrial hygiene. http://id.loc.gov/authorities/subjects/sh85065884...”
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15Published 1923Subjects: “...Kerosene. http://id.loc.gov/authorities/subjects/sh85072068...”
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16Published 1923Subjects: “...Industrial hygiene. http://id.loc.gov/authorities/subjects/sh85065884...”
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17Published 1924Subjects: “...Industrial hygiene. http://id.loc.gov/authorities/subjects/sh85065884...”
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18Published 1913Subjects: “...Cement. http://id.loc.gov/authorities/subjects/sh85021731...”
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19Published 1921Subjects: “...Factories. http://id.loc.gov/authorities/subjects/sh85046823...”
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20Published 1911Subjects: “...Natural gas. http://id.loc.gov/authorities/subjects/sh85053223...”
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