Leichte Feldhaubitze 18 (Bespg. u. Kzg) und leichte Feldhaubitzprotze 18 (Bespg) : Heft 2 : Bilder - Duitsland Voorschrift D 315/2 wo Identification list for ordnance, q.f. 25-pr., marks 2, 2/1, 3, 3/1 & 4 on carriage, 25-pr., mk. 1 with trailer, artillery, no. 27, mk. 1, … Service of the piece 105-mm Howitzer, M 2, truck-drawn - USA Field Artillery Field Manual, FM 6-75 Service of the piece 8-inch Howitzer M 1 - USA Field Artillery Field Manual, FM 6-91 Service of the piece : 105-MM howitzer self-propelled - USA Armored Force Field Manual, FM 17-63