Drill for the 12-inch B.L. Howitzer, mark I (E.O.C), 1915 gun drill amendments, Nov. 1916 (comprising also amendments to the drills for the 6-inch B.L. 26-cwt. Howitzer, 1916, the 8-inch B.L. Howitzer, mark V, 1915, the 9.2-inch B.L. Howitzer, and the 12-inch B.L. Howitzer, mark II (Vickers), 1916).
Great Britain.His Majesty's Stationery Office,issuing body.
Great Britain.War Office.