This primary source comes from the Records of the U.S. Food Administration, 1917 - 1920.
National Archives Identifier:
512575Full Citation: Photograph 4-P-136; 'Feed a Fighter. Eat only what you need- Waste Nothing- That he and his family may have enough.'; ca. 1918; World War I Posters, 1917 - 1919; Records of the U.S. Food Administration, 1917 - 1920, Record Group 4; National Archives at College Park, College Park, MDll. [Online Version, https://www.docsteach.org/documents/document/feed-a-fighter-eat-only-what-you-need, April 26, 2024]