TY  - JOUR
T1  - On the Calculus of Symbols.--Second Memoir. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 11
SP  - 556
EP  - 557
PY  - 1860/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1860.0120
M3  - doi:10.1098/rspl.1860.0120
AU  - Russell, W.
ER  -