Public domain
Hollow steel sucker rod placed in two inch casing. Ridge well project, Saint Mary's County, Maryland
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineHollow steel sucker rod placed in two inch casing. Ridge well project, Saint Mary's County, Maryland. 1941-01-01. Collier, John, Jr., Collier, John. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.