Public domain
Anaconda smelter, Montana. Anaconda Copper Mining Company. A series of roll crushers reduce the size of ore from a maximum of one inch to the size of coarse sand
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineAnaconda smelter, Montana. Anaconda Copper Mining Company. A series of roll crushers reduce the size of ore from a maximum of one inch to the size of coarse sand. 1942-01-01. Lee, Russell. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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