TY  - BOOK
AU  - Ptolemy
AU  - Copernicus, Nicolaus
TI  - The almagest, on the revolutions of the heavenly spheres, Epitome of copernican astronomy, the harmonies of the world
U1  - 823.03 
PY  - 1982///
CY  - Canada
PB  - Willim Benton
KW  - Encyclopedia
ER  -