<a href="//commons.wikimedia.org/wiki/Calvin_Coolidge" title="Calvin Coolidge">Calvin Coolidge</a>, photo portrait head and shoulders, seated.
Copyright by Notman Photo Co., Boston, Mass.
Copyright 1919.
<a rel="nofollow" class="external free" href="http://hdl.loc.gov/loc.pnp/ppmsc.03670">http://hdl.loc.gov/loc.pnp/ppmsc.03670</a>