Public domain
Production. Copper. A ball mill which brings copper ores to fine sizes at a large copper 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. A ball mill which brings copper ores to fine sizes at a large copper concentrator of the Phelps-Dodge Mining Company at Morenci, Arizona. This plant supplies great quantities of th. 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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