Artillery Training. Volume I General Tactical Employment : Pamphlet no. 11. Air Defence - Engeland Voorschrift 26/GS Publications/1014 WO 7258 Anti-Aircraft. Searchlight Drills, 1940 : Supplement no. 1 (Provisional) The "Sperry" Searchlight Equipment, 1940 - Engeland Voorschrift 26/GS Publications/440 Instrument Drill for Predictors, A.A. [ Anti-Aircraft], nos.2 and 5 - Engeland Voorschrift 26/GS Publications/1177 WO 7394