Wright Flying Machine; diagrammatic sketch
<span lang="en">Anonymous</span><span style="display:none">Unknown author</span>
1911-01-01
1911 Encyclopædia Britannica volume 10, page 519,  <a rel="nofollow" class="external free" href="https://archive.org/stream/encyclopaediabri10chisrich#page/519">https://archive.org/stream/encyclopaediabri10chisrich#page/519</a>