Henry A. Wallace, <a href="//commons.wikimedia.org/wiki/Vice_President_of_the_United_States" title="Vice President of the United States">Vice President of the United States</a>
Unknown author<span style="display: none;">Unknown author</span>
Unknown date<div style="display: none;">Unknown date</div>
<a rel="nofollow" class="external free" href="https://www.ars.usda.gov/is/pr/2000/000606.2.htm">http://www.ars.usda.gov/is/pr/2000/000606.2.htm</a>; high res version obtained via email link provided below image.