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Quaker State Refining Company, Oil City, Pennsylvania. It's highly skilled work, seeing to it that the oil refined for our military machines is of the highest quality. This worker is inspecting the solution tower for denaphthizing bright stock
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Credit lineQuaker State Refining Company, Oil City, Pennsylvania. It's highly skilled work, seeing to it that the oil refined for our military machines is of the highest quality. This worker is inspecting the so. 1941-01-01. United States. Office For Emergency Management, Palmer, Alfred T.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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