Retrieved 15 September 2015. ↑ "American airplanes: La - Li". aerofiles.com. Retrieved 15 September 2015. ↑ "Lioré et Olivier LeO H-15". aviafrance.com. Retrieved 15 September 2015. ↑ http://img300.imageshack.us/img300/5306/figura05yh7.jpg ↑ "Nieuport-Delage NiD-590". aviafrance.com.