Van telegraaf tot satelliet : 125 jaar telecommunicatie in de Koninklijke Landmacht 1874-1999 / Sectie Militaire Geschiedenis, Martin Elands ... [et al. ; cartogr.: Louis … agard lecture series Attitude stabilization of satellites in orbit / North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development agard conference proceedings Radar propagation in the arctic / [ed. by Jon Frihagen] national meteorological satellite program Hearings before the Committee on Science and Astronautics U.S. House of Representatives 87th Congress first session, 25-27 july 1961 Voorbij de horizon / A.J. Kampstra
