Natural distribution map for <b><a href="//commons.wikimedia.org/wiki/Category:Abies_concolor" title="Category:Abies concolor"><i>Abies concolor</i> (white fir)</a></b>  — in <a href="//commons.wikimedia.org/wiki/Category:Mexico_Northwest" title="Category:Mexico Northwest">Northwest Mexico</a>, <a href="//commons.wikimedia.org/wiki/Category:California" title="Category:California">California</a>, and the <a href="//commons.wikimedia.org/wiki/Category:Southwestern_United_States" title="Category:Southwestern United States">Southwestern United States</a>.
Elbert L. Little, Jr., of the U.S. Department of Agriculture, Forest Service
1971
<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: Elbert L. Little, Jr. (1971), <i>Atlas of United States trees, <b>Vol. 1</b>, conifers and important hardwoods</i>: U.S. Department of Agriculture Miscellaneous Publication 1146, 9 p., 200 maps.</a>