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Production. Copper. Unloading copper concentrates with a clamshell bucket at the Garfield, Utah smelter of the American Smelting and Refining Company. The concentrates were produced at the Magna and Arthur mills of the Utah Copper Company. Sourced from the Library of Congress.

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Production. Copper. Unloading copper concentrates with a clamshell bucket at the Garfield, Utah smelter of the American Smelting and Refining Company. The concentrates were produced at the Magna and Arthur mills of the Utah Copper Company. Sourced from the Library of Congress.

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