“Great Works of the Western World vol. 16: Ptolemy (The Almagest), Copernicus (On the Revolutions of the Heavenly Spheres), Kepler (The Harmonies of the World)”

Hutchins, Robert M. (ed.) “Great Works of the Western World vol. 16: Ptolemy (The Almagest), Copernicus (On the Revolutions of the Heavenly Spheres), Kepler (The Harmonies of the World)” Encyclop√ɬ¶dia Britannica 1952

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