technical manual 105-mm howitzer M2A1, 105-mm howitzer recoil mechanisms M2A1, M2A2, and M2A3, 105-mm howitzer carriages M2A1 and M2A2, and 105-mm howitzer mounts M4 and M4A1 tm Instrument lights M19, M31, M34, M35, M37, M38, M47, 6578454 and 7983714, 1955 annual reports / war department Annual report of the Chief of Engineers U.S. Army annual reports / war department Report of the Chief of Engineers U.S. Army
