This primary source comes from the Records of the War Department General and Special Staffs, 1860 - 1952.
Full Citation: Food conservation propaganda material sent out in plate form by the Food Administration of New Jersey; 1917 - 1918; Food Administration - Anti-Waste Campaign; American Unofficial Collection of World War I Photographs, 1917 - 1918; Records of the War Department General and Special Staffs, 1860 - 1952, Record Group 165; National Archives at College Park, College Park, MD. [Online Version, https://www.docsteach.org/documents/document/food-conservation-propaganda-material-sent-out-in-plate-form-by-the-food-administration-of-new-jersey, April 18, 2024]