dated 1944* TM 9-235* TM 9-1235* SNL A-29==External links==* "US Army Gets A New Antiaircraft Gun", September 1940, "Popular Science"* FM 4-112 Coast Artillery Field Manual: Antiaircraft Artillery gunnery, Fire Control, Position Finding, and Horizontal Fire, Antiaircraft Automatic Weapons (Case I Firing)* History of the Americanization of the Bofors 40mm Automatic Antiaircraft Gun—some references to the 37mm* 37mm Antiaircraft Automatic Gun—Antiaircraft.org
dated 1944* TM 9-235* TM 9-1235* SNL A-29* «US Army Gets A New Antiaircraft Gun», September 1940, "Popular Science"* FM 4-112 Coast Artillery Field Manual: Antiaircraft Artillery gunnery, Fire Control, Position Finding, and Horizontal Fire, Antiaircraft Automatic Weapons (Case I Firing)* History of the Americanization of the Bofors 40mm Automatic Antiaircraft Gun—some references to the 37mm* 37mm Antiaircraft Automatic Gun—Antiaircraft.org