Beautification of America - Plant for more Beautiful Cities - 6-cent 1969 issue U.S. stamp.
Bureau of Engraving and Printing. Designed by Walter D. Richards.
U.S. Postal Service; National Postal Museum: <a rel="nofollow" class="external text" href="http://arago.si.edu/category_2034270.html">Beautification of America Issue</a>