The <a href="https://fr.wikipedia.org/wiki/Louis_Damblanc" class="extiw" title="fr:Louis Damblanc">Damblanc</a>–Lacoin Alérion helicopter under construction
Unknown author<span style="display: none;">Unknown author</span>
before 12 February 1920 <div style="display: none;">date QS:P,+1920-02-12T00:00:00Z/7,P1326,+1920-02-12T00:00:00Z/11</div>
<cite style="font-style:normal"> (<span class="mw-formatted-date" title="1920-02-12">1920-02-12</span>). "<a rel="nofollow" class="external text" href="https://www.flightglobal.com/pdfarchive/view/1920/1920%20-%200190.html?search=Al%C3%A9rion">Airisms from the Four Winds</a>". <i><a href="https://en.wikipedia.org/wiki/Flight" class="extiw" title="w:Flight">Flight</a></i>: 190.</cite>