TY  - BOOK
AU  - Kepler
AU  - Ptolemy
AU  - Copernicus
TI  - Epitome of Copernican Astronomy : IV and V : The Harmonies of the World
SN  - 0852291639
PY  - 1977///
CY  - Chicago
PB  - Encylopaedia Buitannica
KW  - Astronomy
KW  - German
KW  - Planets
KW  - Sun
ER  -