TY  - JOUR
T1  - An Extract of a Letter Written by Signor Cassini Professor of Astronomy in Bononia, to Monsieur Petit at Paris, and Englished out of the Journal Des Scavans, Concerning Several Spots Lately Discover'd There in the Planet Venus
JF  - Philosophical Transactions (1665-1678)
VL  - 2
SP  - 615
EP  - 617
PY  - 1753/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1666.0064
M3  - doi:10.1098/rstl.1666.0064
AU  - Cassini, S.
ER  -