Public domain
A new electrical control board just installed to take the place of the old manual one. In the airport control room. Washington D.C. municipal airport
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineA new electrical control board just installed to take the place of the old manual one. In the airport control room. Washington D.C. municipal airport. 1941-01-01. Delano, Jack. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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