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Courtesy of UC Berkeley, Bancroft Library
http://www.oac.cdlib.org/ark:/28722/bk0007s8k21/?order=1
Title:
You are helping to build control of the air: Grinnell "An" Standard fittings supply gasoline, oil, and hydraulic fluids on plane
Creator/Contributor:
Unknown, artist
Date:
1941-1945
Contributing Institution:
UC Berkeley, Bancroft Library