Jakovlev AIR-3
neznámý (unknown)
1930-05-15
Le Document aéronautique. Vol. 1930, Nr. 50 (May), p. 320., <a rel="nofollow" class="external free" href="https://gallica.bnf.fr/ark:/12148/bpt6k9767818s/f64.image">https://gallica.bnf.fr/ark:/12148/bpt6k9767818s/f64.image</a>