A United States poster advertising World War I <a href="https://en.wikipedia.org/wiki/Liberty_bond" class="extiw" title="w:Liberty bond">Liberty Bonds</a>
<bdi><a href="https://en.wikipedia.org/wiki/en:Winsor_McCay" class="extiw" title="w:en:Winsor McCay"><span title="American cartoonist and animator">Winsor McCay</span></a>
</bdi>
Library of Congress - <a rel="nofollow" class="external free" href="http://hdl.loc.gov/loc.pnp/cph.3g09888">http://hdl.loc.gov/loc.pnp/cph.3g09888</a>