TY  - BOOK
AU  - Ptolomeo, Claudio, 100-170. "The almagest"
TI  - Ptolemy. Copernicus. Kepler
SN  - 0-85229-163-9
CY  - Chicago, Il.
PB  - Encyclopaedia Britannica, Inc.
KW  - 1. ASTRONOMÍA
KW  - 2. CIENCIA
N1  - "The almagest" (by Ptolemy).--"Introduction, symbols and abbreviations and shorts bibliography to Copernicus and Kepler".--"On the revolutions of the heavenly spheres" (by Nicolaus Copernicus).--"Epitome of conferenccian astronomy". "The harmonies of the world" (by Johannes Kepler)
ER  -