TY  - JOUR
T1  - On the Calculus of Symbols. Third Memoir
JF  - Philosophical Transactions of the Royal Society of London (1776-1886)
VL  - 153
SP  - 517
EP  - 523
PY  - 1863/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1863.0024
M3  - doi:10.1098/rstl.1863.0024
AU  - Russell, W.
ER  -