Radio transmitter T-4/FRC, radio transmitterT-5/FRC, power rectifier PP-1/FRC, modulator MD-1/FRC, switch panel SA-2/FRC, oscillator O-2/FRC, amplifier AM-2/FRC - USA Voorschrift, Technical Manual, 11-820 Service of the piece : 8-inch gun M1 and 240-mm Howitzer M1 - USA War Department Field Manual, FM 6-95 Switchboard BD-96 : repair instructions operational requirements - USA Voorschrift, Technical Manual, 11-4314 Operating practices for army administrative telephone switchboards - USA Voorschrift, Technical Manual, 24-210 Materiel instruction memorandum : The Firing Battery 155mm Howitzer M1 Materiel instruction memorandum : The Firing Battery 105mm Howitzer M2 Materiel instruction memorandum : 75mm Pack Howitzer, M-1 Materiel instruction memorandum : The Firing Battery 75mm Pack Howitzer, M-1 Field artillery : II - USA Voorschrift, Training Regulations, No. 430 Signal corps : Wire axis installation and maintenance within the division - USA Voorschrift, Training Regulations, No. 165-5 Firing Tables. Howitzer, Medium, Towed, 155 mm, M114A1 and M114,. Howitzer, Medium, Self-Propelled, Full-Tracked, 155 mm, M44A1 an M44. Howitzer, Medium Towed, Auxiliairy Propelled, 155 … Cannon 8 inch Howitzer M2 and M2A1 on Howitzer, Heavy, Towed: 8 inch, M115. Cannon 8 inch Howitzer M2A1E1 on Howitzer Heavy, Self-Propelled 8 inch …