Distribution map of <i><a href="//commons.wikimedia.org/wiki/Abies_amabilis" title="Abies amabilis">Abies amabilis</a></i> (Douglas ex Loudon) Douglas ex Forbes (Pacific Silver Fir)
Elbert L. Little, Jr., U.S. Department of Agriculture, Forest Service, and others
between 1966 and 1978 <div style="display: none;">date QS:P,+1950-00-00T00:00:00Z/7,P1319,+1966-00-00T00:00:00Z/9,P1326,+1978-00-00T00:00:00Z/9</div>
<a rel="nofollow" class="external text" href="https://esp.cr.usgs.gov/data/little/">USGS Geosciences and Environmental Change Science Center, Digital Representations of Tree Species Range Maps from "Atlas of United States Trees" by Elbert L. Little, Jr. (and other publications)</a>