Gun Drill (R.A. (A.A). Units) for 20-mm. Hispano, Polsten, and Oerlikon Machine Guns. (Provisional). WO 7399 - Engeland Voorschrift 26/GS Publications/1150 WO 7399 Gun Drill for Q.F. 3.7-inch Mark I, Howitzer on Carriage 3.7 inch, Mark 2P - Engeland Voorschrift 26/GS Publications/1467 WO 7981 Gun Drill for 40-mm. A.A. Gun on S.P. Mounting - Engeland Voorschrift 26/GS Publications/1323 WO 7402 Gun Drill for Q.F. 3.7 inch, Mark II or III Gun, on Mounting Q.F. 3.7 inch. A.A. Mark II. Land Service. - Engeland Voorschrift 26/GS … Small arms training : Pistol (.38-inch) / War Office. Army Council. Vol. I - Engeland Voorschrift, 26/GS Publications/529 Instructional notes on the Ross rifle 303-inch Mark III B - Engeland Voorschrift, 26/GS Publications/364 Small arms training : Mortar (2-inch) / War Office. Army Council. Vol. I - Engeland Voorschrift, 26/GS Publications/146 Small arms training : Mortar (2-inch) / War Office. Army Council. Vol. I - Engeland Voorschrift, 26/GS Publications/1157 Gun Drill for Q.F. 6 PR., 7-CWT. Gun on Carriage 6-PR., Marks 1, 1A, and II - Engeland Voorschrift 26/GS Publications/1148 WO 7342 Gun Drill for B.L. 4.5-inch, Mark 2 Gun on Carriage 5.5-inch or 4.5-inch, Marks 1 and 2 and B.L. 5.5-inch, Mark 3 Gun on Carriage …