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 Zakboek Sovjet Materieel. Wapens, Voertuigen en Helicopters Identification friend or foe : being the story of aircraft recognition / written and designed by Tim Hamilton 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 aanduiding van militaire vliegtuigen in Nederland / [P.J.M. Kamps, vrijwillig medewerker, Militaire Luchtvaart Museum]
