This North American range map of <i><a href="https://en.wikipedia.org/wiki/Juniperus_communis" class="extiw" title="w:Juniperus communis">Juniperus communis</a></i>, the common <a href="https://en.wikipedia.org/wiki/juniper" class="extiw" title="w:juniper">juniper</a>, was published in a <a href="https://en.wikipedia.org/wiki/United_States_Geological_Survey" class="extiw" title="w:United States Geological Survey">USGS</a> publication: <a rel="nofollow" class="external text" href="https://greenwood.cr.usgs.gov/pub/ppapers/p1650-a/pages/conifers.html">Conifers</a>. <i>Climate-Vegetation Atlas of North America</i>. <a href="https://en.wikipedia.org/wiki/United_States_Geological_Survey" class="extiw" title="w:United States Geological Survey">USGS</a>. Retrieved on <span class="mw-formatted-date" title="2007-11-11">2007-11-11</span>.<br>
Maps and ArcView shapefiles can also be downloaded here: Little, Jr., Elbert L. <a rel="nofollow" class="external text" href="https://esp.cr.usgs.gov/data/atlas/little/">Atlas</a>. <a href="https://en.wikipedia.org/wiki/United_States_Geological_Survey" class="extiw" title="w:United States Geological Survey">USGS</a>. Retrieved on <span class="mw-formatted-date" title="2007-11-11">2007-11-11</span>.<sup class="noprint Inline-Template"><span style="white-space: nowrap;">[<span style="font-style:italic;"><span title="" class="plainlinks"><a class="external text" href="https://en.wikipedia.org/wiki/Wikipedia:Link_rot">dead link</a></span></span>]</span></sup>
Robert S. Thompson, Katherine H. Anderson, and Patrick J. Bartlein
1999
<cite class="book" style="font-style:normal" id="Reference-Thompson-1999">Thompson, Robert S.; Katherine H. Anderson and Patrick J. Bartlein (1999)      <i> Atlas of Relations Between Climatic Parameters and Distributions of Important Trees and Shrubs in North America</i>, <a href="https://en.wikipedia.org/wiki/U.S._Geological_Survey" class="extiw" title="w:U.S. Geological Survey">U.S. Geological Survey</a>  <small></small></cite> (Professional Paper 1650 A&amp;B)