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Production. Copper. Ball mills, which grind copper ores to small sizes, at a large concentrator of the Phelps-Dodge Mining Company at Morenci, Arizona. This plant supplies great quantities of the copper so vital in our war effort
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Credit lineProduction. Copper. Ball mills, which grind copper ores to small sizes, at a large concentrator of the Phelps-Dodge Mining Company at Morenci, Arizona. This plant supplies great quantities of the copp. 1942-01-01. Henle, Fritz, United States. Office Of War Information. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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