TY  - BOOK
AU  - Ptolemy
TI  - The Almagest, by Ptolemy, On the revolutions of the Heavenly sphere, by Nicolaus Copernicus: Epitome of copernican Astronomy IV and V; the harmonies of the world Vby Johannes Kepler
PY  - 1952///
CY  - Chicago
PB  - Encyclopedia Britannica
KW  - Astronomy
ER  -