Handbook of the Colt automatic machine gun, caliber .30 with pack outfits and accessories Handbook of the Colt automatic machine gun model 1919, Colt automatic machine rifle model 1919, Colt aircraft machine gun model 1919 Machine gun manual : a complete manual to machine gunnery containing details of Maxim Vickers Lewis Colt Hotchkiss together with Drill (elementary and advanced) : …