Base Headquarters and 20th Air Base Squadron emblem
<a href="https://en.wikipedia.org/wiki/United_States_Army_Institute_of_Heraldry" class="extiw" title="en:United States Army Institute of Heraldry">en:United States Army Institute of Heraldry</a>
2017-05-16
<ul><li><cite class="book" style="font-style:normal" id="Reference-Clay-2011">Clay, Steven E. (2011)      <i> <a rel="nofollow" class="external text" href="http://www.cgsc.edu/carl/download/csipubs/OrderOfBattle/OrderofBattle3.pdf">US Army Order of Battle 1919-1941</a></i>, Vol. 3 The Services: Air Service, Engineers, and Special Troops 1919-1941, Fort Leavenworth, KS:  Combat Studies Institute Press. Archived from <a rel="nofollow" class="external text" href="https://web.archive.org/web/20130927135817/http://www.cgsc.edu/carl/download/csipubs/OrderOfBattle/OrderofBattle3.pdf">the original</a> on 27 September 2013. Retrieved on October 16, 2012. <small><a href="https://en.wikipedia.org/wiki/International_Standard_Book_Number" class="extiw" title="en:International Standard Book Number">ISBN</a>:  <a href="//commons.wikimedia.org/wiki/Special:BookSources/978-0-98419-014-0" title="Special:BookSources/978-0-98419-014-0">978-0-98419-014-0</a>.  <a href="https://en.wikipedia.org/wiki/Online_Computer_Library_Center" class="extiw" title="en:Online Computer Library Center">OCLC</a>:   <a rel="nofollow" class="external text" href="https://www.worldcat.org/oclc/637712205">637712205</a>. </small></cite></li></ul>