Photo of Nieuport Madon WW1 airplane rear samf4u.jpg
Unknown author<span style="display: none;">Unknown author</span>
<p><b>Original publication</b>: 1917<br></p>
<b>Immediate source</b>: <a rel="nofollow" class="external free" href="https://translate.google.com/translate?hl=en&amp;sl=ru&amp;u=http://www.airwar.ru/enc/fww1/madon.html&amp;prev=search">https://translate.google.com/translate?hl=en&amp;sl=ru&amp;u=http://www.airwar.ru/enc/fww1/madon.html&amp;prev=search</a>