Training Memorandum. no.14. Royal Artillery. (Field, Anti-Tank and Anti-Aircraft Branches). WO 7324 Training Memorandum. no.13. Royal Artillery. (Field, Anti-Tank and Anti-Aircraft Branches). WO 7323 Artillery Training. Field Gunnery. Volume III. Pamphlet no.3 A, Part I, Fire Dicipline and Observation of Fire, 1942, WO 7972 Artillery Training Pamphlet. no.5. Survey. Volume VI. General Principles and Practice of Sound Ranging, WO 7311 Artillery Training. Pamphlet no.6. Survey. Volume VI. Estimation of Calibre form Time of Flight. WO 7313 Training Memorandum. no.15. Royal Artillery. (field, Anti-Tank and Anti-Aircraft Branches). WO 7325 Directions for the use artillery Instrument. Pamphlet no.1. Air Burst Ranging Charts. WO 7330 Directions for the use of artillery instruments. Pamphlet no.3. The Slide Rule, 1937. WO 7332 Directions of the use Artillery Instrument. Pamphlet no.8. The Comparator, Sound Ranging. WO 7336 Directions for the use of artillerie instruments Pamphlet no.9. Recorder, Sound Ranging, no.1, Marks II, III, and IV. WO 7337 Directions for the use artillery instruments. Pamphlet no.11.The Twin Marchant Calculating Machine, WO 7339 Directions for the use of artillery instrument. Pamphlet no.13. Carrier Link, Sound Ranging. WO 7341