Instruction sur le role de l'aviation de combat sur le missions de l;aviation d'observation et sur les missions d'obsarvation de l'aerostation Flash-Spotting Training. Pamphlet no.1. Air Burst Ranging (for use by Survey Regiments, R.A.). WO 7308 - Engeland Voorschrift, 26/G.S. Publications/479 British aircraft industry : a directory of Aircraft, Aero-Engines Component Parts, Accessories and Materials, 1939 / The Society of British Aircraft Constructors Aircraft recognition : Part I (British) Aids to Weapon Training some ideas on improvisation Military aircraft recognition 1970 / John W.R. Taylor Koninklijke luchtmacht 70 / C. van der Velden en E. Ragas the new observer’s series New Observer's Book of Aircraft / compiled by William Green ; with silhouettes by Dennis Punnett Visual aircraft recognition / Headquarters, Department of the Army - USA Field Manual, FM 44-30 Hoheitsabzeichen der Kriegsflugzeuge : schematische Darstellung : die Hoheitsabzeichen, besonders am Rumpf, sind der Deutlichkeit halber übertrieben groß gezeichnet grote alken Koninklijke luchtmacht / A.P. de Jong Koninklijke Luchtmacht / A.P. de Jong