本期参考文献，感觉大家长久以来的催更~
【1】.Robert Frank Futrell, Ideas, Concepts, Doctrines: Basic Thinking in the United States Air Force 1907-1960 (Volume I, Air University Press 1989).
【2】.Emmanuel Gustin & Anthony Williams, Flying Guns World War II: Development of Aircraft Guns, Ammunition and Installations 1933-45 (Airlife Publishing 2003).
【3】.George M Chinn, The Machine Gun: History, Evolution, and Development of Manual, Automatic, and Airborne Repeating Weapons (Volume I, Department of the Navy 1951).
【4】.Constance McLaughlin Green & Harry C Thomson et al, The Ordnance Department: Planning Munitions for War (Center of Military History, United States Army 1990).
【5】.Maurice Azar, ‘Pursuit of the Torch: Influences on Acquisition of USAAF Fighter Aircraft Used in the North Africa Campaign’ (2010) School of adv. Air & Space Studies Air University, Maxwell Air Force Base, Master’s Thesis.
【6】.Maj. Eric S. Mathewson, ‘The Impact of the Air Corps Tactical School on The Development of Strategic Doctrine’ (1998) Air Command and Staff College, Air University, Maxwell Air Force Base, AU/ACSC/98-182/1998-04.
【7】.AAF 200-1, Manual for Fighter Gun Harmonization (Headquarters, Army Air Forces 1945).
【8】.TM 9-225, Browning Machine Gun Caliber .50, M2, Aircraft, Fixed and Flexible (War Department 1940).
【9】.Office of the Chief of Ordnance Research and Development Service, Record of Army Ordnance Research and Development - Volume 2: Small Arms and Small Arms Ammunition (January 1946).
【10】.Caliber .50, M2 Browning Machine Gun (General Motors 1945).
【11】.Fighter Gunnery (Army Air Forces Training Command 1944).
