United States. Dept. of the Treasury. Publicity Bureau. Remember! the flag of liberty, support it! : buy U.S. government bonds, 3rd. Liberty Loan., poster, 1918; (https://digital.library.unt.edu/ark:/67531/metadc29409/m1/1/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .