Pilots of the 1924 Round The World Flight  (Left to RIght): 1st Lt. John Harding, 1st Lt. Erik Nelson, 1st Lt. Leigh Wade, Maj. Frederick Martin, !st Lt. Leslie Arnold, 1st Lt. Lowell Smith, and Lt. L.D. Schulze. (Schulze and Arnold are alternates)
United States Air Force
Maurer Maurer, 1987, Aviation in the US. Army, 1919-1938, United States Air Force Historical Research Center, Office of Air Force History,  United States Air Force, Washington, D.C.