Ballons dirigeables Dirigeables : etude complete de la direction des ballons des tentatives realisees et des projets nouveaux Simple aerodynamics and the airplane Memoires sur la possibilite de reduire au minimum les dimensions des terrains d'aviation grace a des procedes nouveaux de catapuitage First stage mathematics : suitable for the R.A.F. and A.T.C. Alleviation of Jet Aircraft Noise Near Airports : A Report of the Jet Aircraft Noise Panel Aircraft navigation part I : theory , part II : practice Air navigations : theory and practice Air navigation - part seven : nautical astronomy & Celestial Navigation Air transport navigation : for pilots and navigators Handboekje L-4J flight testing of production aircraft