Public domain
Production. Airplane engines. Airplane engine tests in a Midwest plant provide performance data recorded on an array of precision instruments in a small booth presided over by specially trained men. Continental Motors, Michigan
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineProduction. Airplane engines. Airplane engine tests in a Midwest plant provide performance data recorded on an array of precision instruments in a small booth presided over by specially trained men. C. 1942-01-01. Palmer, Alfred T., United States. Office Of War Information. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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