This primary source comes from the Records of the U.S. Food Administration.
National Archives Identifier:
512717Full Citation: 4-P-280; All About W.S.S. What are they?...Why Should I Buy Them?...How Can I Buy Them?... Where Can I Buy Them?... Every Stamp helps to Save a Life, Every Stamp Helps To End The War...; ca. 1917-ca. 1919; World War I Posters, 1917–1919; Records of the U.S. Food Administration, Record Group 4; National Archives at College Park, College Park, MD. [Online Version, https://docsteach.org/documents/document/all-about-wss, May 20, 2025]