This primary source comes from the Records of the Office of the Chief Signal Officer.
National Archives Identifier:
24610Full Citation: Motion Picture 111-H-1102; German War Film; 1914-1918; Historical Films, ca. 1914 - ca. 1936; Records of the Office of the Chief Signal Officer, Record Group 111; National Archives at College Park, College Park, MD. [Online Version, https://www.docsteach.org/documents/document/german-war-film, May 1, 2024]