Aircraft <a href="https://en.wikipedia.org/wiki/en:Avia_BH-11" class="extiw" title="w:en:Avia BH-11">Avia BH-11</a> disassembled. Contest  "Challenge International de Tourisme 1929".
Unknown author<span style="display: none;">Unknown author</span>
1929
<ul><li>Letec magazine, volume V, issue 9, page 486, September 1929</li>
<li>black and white version of <a class="external free" href="https://commons.wikimedia.org/wiki/File:Avia_BH-11_disassembled.jpg">http://commons.wikimedia.org/wiki/File:Avia_BH-11_disassembled.jpg</a></li></ul>