TY  - BOOK
AU  - Galileo Galilei
AU  - ,
TI  - Dialogue concerning the two chief world systems ptolemaic & copernican 
SN  - 0520004507
U1  - 509  GAD 
PY  - 1967///
CY  - USA
PB  - University of california press
KW  - Science history
N1  - Scienc-GED
ER  -