Public domain
Untitled photo, possibly related to: Roughneck tying piece of string around cable to determine depth to which bailer is being lowered. Oil well near Seminole, Oklahoma
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineUntitled photo, possibly related to: Roughneck tying piece of string around cable to determine depth to which bailer is being lowered. Oil well near Seminole, Oklahoma. 1939-01-01. Lee, Russell. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.