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 Training Memorandum. no.15. Royal Artillery. (field, Anti-Tank and Anti-Aircraft Branches). WO 7325 Instruction for practice seaward. Royal Artillery.1938. WO 7464 - Engeland Voorschrift Vocabulary of army ordnance stores. Section V 3. Flash spotting, sound ranging and R.A. survey stores. WO 1858