This primary source comes from the Records of the Office of the Chief Signal Officer.
National Archives Identifier:
530756Full Citation: With the Americans northwest of Verdun. The skipper and gunner of a 'whippet' tank, with the hatches open. France; ca. 1918; Records of the Office of the Chief Signal Officer, Record Group 111. [Online Version, https://docsteach.org/documents/document/with-the-americans-northwest-of-verdun-the-skipper-and-gunner-of-a-whippet-tank-with-the-hatches-open-france, June 3, 2023]