<a href="https://en.wikipedia.org/wiki/A.V._Roe,_1930" class="extiw" title="en:A.V. Roe, 1930">A.V. Roe, 1930</a>.
Unknown author<span style="display: none;">Unknown author</span>
1930-06-20
<a rel="nofollow" class="external text" href="http://www.flightglobal.com/pdfarchive/view/1930/untitled0%20-%200699.html">Flight, 20 June 1930, p. 659</a>