Spitz, A., & Gaynor, F. (1959). Dictionary of astronomy and astronautics. New York: Philosophical Library.
Παραπομπή Chicago StyleSpitz, Armand, and Frank Gaynor. Dictionary of Astronomy and Astronautics. New York: Philosophical Library, 1959.
Παραπομπή MLASpitz, Armand, and Frank Gaynor. Dictionary of Astronomy and Astronautics. New York: Philosophical Library, 1959.
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