Variometer, aerial Groene veldmuts officier Topografische Dienst KNIL, met goudgalon- en groene bies en losse kinband Variometer Aerial Mortier in stelling tijdens de vliegdemonstratie te Andir, 30 Mei 1939. Airframe van het North American (Noorduyn) AT-16ND 'Harvard' IIB lesvliegtuig met registratie B-175 en constructienummer 14-765 ontdaan van alle huidbeplating en vleugels. left book club edition protection of the public from aerial attack : being a critical examination of the recommendations put forward by the Air Raid Precautions Department of the … Aerial photography Aerial photography : Practice and application Elementary map and aerial photograph reading - USA Voorschrift, Basic Field Manual, 21-25 training manual Topography and surveying / War Department : Map and aerial photograph reading / War Department training regulations Topography and surveying / War Department : Map and aerial photograph reading / War Department Aerial bombardment and the international regulation of warfare / by M.W. Royse