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El Paso, Texas, Phelps Dodge refining company. Interior of a copper refining plant
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineEl Paso, Texas, Phelps Dodge refining company. Interior of a copper refining plant. 1942-01-01. Henle, Fritz. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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