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 Directions for the use of artillery instrument. Pamphlet no.14. Sound Ranging Equipment, Misellaneous, WO 7034 Handbook of artillery instruments and range-finders. Part. I. 1933. Section 33. Director no. 7, Mark III A with notes on Marks I, I**, I**A, II, … Vocabulary of army ordnance stores. Section W 5. Instruments for testing optical and fire control instruments WO 302 Vocabulary of army ordnance stores. Section V 3. Flash spotting, sound ranging and R.A. survey stores. WO 1858 Vocabulary of army ordnance stores. Section V 4. Fire Control Instruments and Associated Stores for Anti-Aircraft. WO 296 Vocabulary of army ordnance stores. Section V 4. Fire Control Instruments and Associated Stores for Anti-Aircraft. 1943. WO 296 Vocabulary of army ordnance stores. Section V 1. Fire Control Instruments and Associted Stores for Coast Artillery. WO 293 Geneeskundige Dienst. Medische en Chirurgische Instrument en Toestellen. NATO-Klase 6515. NC 8-37 Notes on repairs to fire control instruments. Part 47. Sights, DIal, Nos. 7, 7 A, B and C. WO 780 Handbook of Artillery Instruments and Rage-Finders. Part I. Section 14. Calculator, Ballistic Correction, no.1, Mark I. 1933