Consolidated Courier 3-view drawing from L'Air April 15,1928
L'Air magazine
1928-04-15
<a rel="nofollow" class="external free" href="https://gallica.bnf.fr/ark:/12148/bpt6k97977759/f27.item">https://gallica.bnf.fr/ark:/12148/bpt6k97977759/f27.item</a>