ORTA Saint-Hubert G.1 (Les Ailes, Novembre 1929)
Unknown author<span style="display: none;">Unknown author</span>
Les Ailes, Vol. 9 (1929), No. 438 (1929-11-07), p. 3., <a rel="nofollow" class="external free" href="https://gallica.bnf.fr/ark:/12148/bpt6k6554668p/f3.item">https://gallica.bnf.fr/ark:/12148/bpt6k6554668p/f3.item</a>