Public domain
Workmen using viberators which spread the wet concrete in construction of Shasta Dam, Shasta County, California
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineWorkmen using viberators which spread the wet concrete in construction of Shasta Dam, Shasta County, California. 1941-01-01. Lee, Russell. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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