155 mm. Howitzer M1, Towed. FM 6-81 155 mm. Howitzer M1 on Motor Carriage M41. FM 6-82 Field Artillery. Service of the Piece 155 mm. Gun M1918. FM 6-85 155 mm. Gun M53 Self-Propelled and 8 Inch Howitzer M55 Self-Propelled. FM 6-93 Field Artillery. Service of the Piece 240 mm. Howitzer M1918. FM 6-95 280 mm. Gun T131 on Carriage T72. FM 6-96 The Field Artillery Observation Battalion and Batteries. FM 6-120 Field Artillery. Target Acquisition.. FM 6-121 Artillery Sound Ranging and Flash Ranging. FM 6-122 Qualification Tests for Specialists, Field Artillery. FM 6-125 Adjustment of Artillery Fire by the Combat Soldier. FM 6-135 Field Artillery Battery. FM 6-140
