<a href="https://en.wikipedia.org/wiki/American_Bar_Association" class="extiw" title="en:American Bar Association">American Bar Association (ABA)</a> 75th Anniversary 3-cent 1953 issue U.S. stamp. 1878 - Liberty Under Law - 1953.
Bureau of Engraving and Printing.
U.S. Postal Service; <a rel="nofollow" class="external text" href="http://arago.si.edu/category_2028948.html">National Postal Museum</a>