TY  - JOUR
T1  - Extracts of Two Letters, the One from Monsieur Christian Hugens de Zulichem, Touching His Thoughts of Mr. Hook's Observations for Proving the Motion of the Earth; The Other from Seignior Cassini, Concerning the Same Argument
JF  - Philosophical Transactions (1665-1678)
VL  - 9
SP  - 90
EP  - 91
PY  - 1753/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1674.0023
M3  - doi:10.1098/rstl.1674.0023
AU  - de Zulichem, C.
AU  - Cassini, S.
ER  -