1. Ptolemy: The almagest ; Nicolaus Copernicus: On the revolutions of the heavenly spheres ; Johannes Kepler: Epitome of Copernican astronomy: IV -V [and] The harmonies of the world: V. Author/Creator: Ptolemy, active 2nd century Publication/Creation: Chicago : Encyclopædia Britannica, [1990] Resource Type: Book Edition: 2nd ed. Access & Availability: Loading
2. The almagest, Author/Creator: Ptolemy, active 2nd century Publication/Creation: Chicago : Encyclopædia Britannica, [1955] Resource Type: Book Access & Availability: Loading