De Havilland Moth detail drawing from Le Document aéronautique April,1927
Le Document aéronautique
1927-04-01
<a rel="nofollow" class="external free" href="https://gallica.bnf.fr/ark:/12148/bpt6k9767758z/f40.item">https://gallica.bnf.fr/ark:/12148/bpt6k9767758z/f40.item</a>