"Space flight." . . "Geschichte 1923." . . "Geschichte 1923" . "Planetas Exploración." . . "Raumfahrt." . . "Raumfahrt" . "Interplanetary voyages." . . . . "TECHNOLOGY & ENGINEERING / Engineering (General)" . . . . . "The rocket into planetary space" . "The rocket into planetary space"@en . "Rocket into planetary space"@en . . . "Electronic books"@en . . . . . . . "The Rocket into Planetary Space" . "For all being interested in astronautics, this translation of Hermann Oberth's classic work is a truly historic event. Readers will be impressed with this extraordinary pioneer and his incredible achievement. In a relatively short work of 1923, Hermann Oberth laid down the mathematical laws governing rocketry and spaceflight, and he offered practical design considerations based on those laws."@en . . . . . . . "Quelle" . . . . . . . . . . . . "˜Theœ Rocket into Planetary Space" . . . . . . "Die Rakete zu den Planetenräumen" . . . . . . . . . . . "Die rakete zu den planetenräumen" . . "Online-Publikation" . . "Rockets (Aeronautics)" . . "Geschichte." . . "Rakete." . . "Rakete" .