Duitsche wapenen : deel 1 infanterie wapenen - Koninklijke Landmacht voorschrift no. 810 Field artillery : tactics and technique of division artillery and higher artillery echelons - USA War Department Field Manual, FM 6-100 wo Identification list for ordnance, q.f. 6-pr. 7-cwt., marks 2 & 4 on carriage, 6-pr., marks 1,3 & 3/1. / By Command of the Army Council