Public domain
Steel manufacture, Allegheny-Ludlum. To the left is a portion of the panels containing metering devices and to record the operations of generators such as this, which power a rolling mill
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineSteel manufacture, Allegheny-Ludlum. To the left is a portion of the panels containing metering devices and to record the operations of generators such as this, which power a rolling mill. 1940-01-01. United States. Office For Emergency Management, Palmer, Alfred T.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
