Portal:Air forces

Royal Air Force

 * War Flying, 1917 by "Theta"
 * Sixty Squadron, R.A.F., 1920 by Alan John Lance Scott - A history of the squadron from its formation
 * The War in the Air, 1922 by Walter Alexander Raleigh
 * RAF Pilot's Flying Log Book (volume 2) by Albert George Sims

United States Air Force

 * Portal:United States Air Force