digging <a href="https://en.wikipedia.org/wiki/Botta%27s_pocket_gopher" class="extiw" title="en:Botta's pocket gopher">en:Botta's pocket gopher</a> (<i>Thomomys bottae</i> subspecies <i>alpinus</i> (<i>Yosemite pocket gopher</i>))
<p>Unknown author<span style="display: none;">Unknown author</span>
</p>
University of California Press
1924
<p><a rel="nofollow" class="external free" href="http://www.nps.gov/history/history/online_books/grinnell/images/plate29.jpg">http://www.nps.gov/history/history/online_books/grinnell/images/plate29.jpg</a>
</p>
original source is Grinnell and Storer's <a rel="nofollow" class="external text" href="https://archive.org/details/animallifeinyose00grin">Animal Life in the Yosemite</a> (<a rel="nofollow" class="external text" href="https://archive.org/stream/animallifeinyose00grinrich#page/698/mode/2up">page 699</a>)