1918 Keep Him Free. Buy War Savings Stamps

Bull, Charles Livingston, 1874-1932. Keep him free, buy war savings stamps issued by the United States Treasury Dept., poster, 1918; Phila.. (https://digital.library.unt.edu/ark:/67531/metadc29419/m1/1/: accessed November 27, 2025), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Special Collections.