Berman, A. (1961). The physical principles of astronautics: Fundamentals of dynamical astronomy and space flight. New York: John Wiley.
Παραπομπή Chicago StyleBerman, Arthur. The Physical Principles of Astronautics: Fundamentals of Dynamical Astronomy and Space Flight. New York: John Wiley, 1961.
Παραπομπή MLABerman, Arthur. The Physical Principles of Astronautics: Fundamentals of Dynamical Astronomy and Space Flight. New York: John Wiley, 1961.
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