Rocket and space scope Voorbij de horizon / A.J. Kampstra Model rocket design and construction : how to create and build unique and exciting model rockest that work / Timothy S. Van Milligan German aviation show Hannover 1972 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 Kosmos en mens / J.M.J. Kooy Proceedings of a Conference on results of the first U.S. manned suborbital space flight, June 6, 1961, U.S. department of state auditorium / National Aeronautics …
