Public domain
Knox County, Tennessee (Tennessee Valley Authority (TVA)). Spring plowing with a Case tractor
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineKnox County, Tennessee (Tennessee Valley Authority (TVA)). Spring plowing with a Case tractor. 1942-01-01. Rothstein, Arthur. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.