Public domain
Untitled photo, possibly related to: El Paso, Texas, Phelps Dodge refining company. Electrolytic tanks in which sheets of pure copper are formed. The sheets are later melted and cast into ingots
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineUntitled photo, possibly related to: El Paso, Texas, Phelps Dodge refining company. Electrolytic tanks in which sheets of pure copper are formed. The sheets are later melted and cast into ingots. 1942-01-01. Henle, Fritz. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.