TY  - JOUR
T1  - Some Remarks upon the Method of Observing the Differences of Right Ascension and Declination by Cross Hairs in a Telescope. By Dr. Edm. Halley, Astr. Reg. R. S. S.
JF  - Philosophical Transactions (1683-1775)
VL  - 31
SP  - 113
EP  - 116
PY  - 1753/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1720.0028
M3  - doi:10.1098/rstl.1720.0028
AU  - Halley, E.
ER  -