Service of the piece : Multiple machine gun mounts - USA Voorschrift, Field Manual, 44-57 Coast defense - USA Voorschrift, Basic Field Manual, 31-10 Jungle operations - USA Voorschrift, Field Manual, 31-30 Supply of ground units by air - USA Voorschrift, Basic Field Manual, 31-40 Service of the piece 40-mm fire unit - USA Voorschrift, Field Manual, 44-60 Transportation intelligence - USA Voorschrift, Field Manual, 55-8 Transporatation corps reference data - USA Voorschrift, Field Manual, 55-15 Amphibious operations embarkation and ship loading (unit loading officer) - USA Voorschrift, Field Manual, 60-30 Airmobile operations - USA Voorschrift, Field Manual, 57-35 Field Service Regulations Larger Units - USA Voorschrift, Field Manual, 100-15 Staff Officers Field Manual : Nuclear Weapons Employment - USA Voorschrift, Field Manual, 101-31-1 Basic Half-Track Vehicles (IHC) (Personnel Carrier M5, Car M9A1, Multiple Gun Motor Carriage M14, and Similar IHC Vehicles) - USA Voorschrift, Technical Manual, 9-707