field manual Browning machine gun caliber .30, HB, M1919A4 (mounted in combat vehicles) / prep. under dir. of the Chief of Infantry field manual Browning machine gun, caliber .30, M1917 field manual 81-MM mortar, MI / Prepared under direction of the chief of infantry field manual Barrage balloon : operation of matériel and employment of personnel field manual Watermanship field manual 81-MM mortar squad and platoon field manual 75-mm tank gun M 2 : (mounted in medium tank M 3) war department technical manual Field artillery Fire-control instruments / prepared under direction of the chief of field artillery training manual / united states army field lineman : instructors guide for all arms field manual Infantry division / Headquarters, Department of the Army field manual Field wire technique Engineer field manual : parts I-VI : U.S.A.