Washington, Office of Air Force History.
Eduard Mark of the Center for Air Force History hotly disputed this analysis.
Washington DC: Center of Air Force History, 1993.
Office of Air Force History, 1984.
Washington, D.C.: Center for Air Force History, 1992 (first edition 1951).
Office of Air Force History, 1961, republished 1983.
Office of Air Force History, 1989.
Center for Air Force History.
Washington, D.C.: Office of Air Force History, 1985.
Washington DC: Office of Air Force History, 1986.
Washington, Office of Air Force History.
Eduard Mark of the Center for Air Force History hotly disputed this analysis.
Washington DC: Center of Air Force History, 1993.
Office of Air Force History, 1984.
Washington, D.C.: Center for Air Force History, 1992 (first edition 1951).
Office of Air Force History, 1961, republished 1983.
Office of Air Force History, 1989.
Center for Air Force History.
Washington, D.C.: Office of Air Force History, 1985.
Washington DC: Office of Air Force History, 1986.