TY  - BOOK
AU  - Ptolemaous,Claudius
AU  - Copernicus,Nicolaus,1473-1543
AU  - Kepler,Johann,1571-1630
TI  - The Almagest
PY  - 1983///
CY  - Chicago
PB  - Encyclopedia Britannica
KW  - Astronomy
KW  - Early works to 1800
KW  - Mathematics, Greek
ER  -