Directions for the artillery instruments. Pamphlet no.4.The Radio Link S.R. Mark I. WO 7333 Directions for the use artillery instruments. Pamphlet no.10. Flash Spotting Instrument no.4, Mark III, WO 7338 Directions for the use of artillery instrument. Pamphlet no.7.Theodolites, Optical Scale, 3 1/2 inch, Nos. 1 and 2. WO 7335 Handbook of Artillery Instruments and Rage-Finders. Part I. Section 16, Indicator, Time of Flight, Mark IV Handbook of Artillery Instruments and Rage-Finders. Part I. Section 14. Calculator, Ballistic Correction, no.1, Mark I. 1933 Artillery Training Pamphlet. no.5. Survey. Volume VI. General Principles and Practice of Sound Ranging, WO 7311 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