Field Artillery : Tactical Employment - USA Field Manual, FM 6-20 Field artillery : Gunnery - USA Field Manual, FM 6-40 Gunnery instruction memorandum : The Graphical Firing Table (GFT) Gunnery instruction memorandum : Conduct of Fire by Forward Observation Methods Gunnery instruction memorandum : Use of Oblique Photographs in Firing Gunnery instruction memorandum : Time Fire Using Shell Fuzed With Fuze M54 of M55 Gunnery instruction memorandum : Technique of Fire Direction Materiel instruction memorandum : The Firing Battery 155mm Gun M1 Gunnery instruction memorandum : 12-inch graphical firing tables Gunnery instruction memorandum : Survey plans and procedures in the field artillery battalion and regiment Troop Leading and Staff Functioning of the Infantry Battalion and Regiment Tactics instruction memorandum : Organization and Functioning of Field Artillery of the Marine Division