Dornier Do.C III Komet I 3-view drawing from Les Ailes August 11, 1921
Les Ailes newspaper
1921-08-11
<a rel="nofollow" class="external free" href="https://gallica.bnf.fr/ark:/12148/bpt6k6555947v/f43.double">https://gallica.bnf.fr/ark:/12148/bpt6k6555947v/f43.double</a>