training regulations Topography and surveying / War Department : Map and aerial photograph reading / War Department Map and aerial photo reading simplified / W.F. Heavey air science 2 Elements of aerial warfare : operations war department technical manual Aerial phototopography / War Department Aerial photography - USA Voorschrift, Technical Manual, 1-220 Elementry map and aerial photography reading - USA Voorschrift, Field Manual Advanced map and aerial photograph reading - USA Voorschrift, Field Manual, 21-26 Advanced map and aerial photograph reading - USA Basic Field Manual, FM 21-26 Reports of the civil aerial transport commitee Aerial warfare / R.P. Hearne ; with an introduction by Sir H. Maxim Vol.I V.H.F. ground station aerial systems, general and technical information: Zie AP 116E-1702-1 Militaire Luchtvaart voormalige Nederlands Oost-Indië, fotoalbum aangeboden aan de commandant van het leger, lt-genl M. Boerstra te Andir, 10 Juli 1939
