Field Artillery : Tactical Employment - USA Field Manual, FM 6-20 Field artillery : Gunnery - USA Field Manual, FM 6-40 Training circulars Finance department : general provisions - United States War Department, Army Regulations 35-5 Civilian personnel regulations Circular Technical bulletin Thompson submachine gun caliber .45, M1928A1 - USA Basic Field Manual, FM 23-40 Manual of guard duty Training regulations : Guard Duty Interior Guard duty: volume VI / prepared under direction of the Chief of Infantry - United States War Department, Basic Field Manuel, FM 26-5 Conventional signs, military symbols, and abbreviations / prep. under direction of the Chief of Engineers - USA Basic Field Manual, FM 21-30