TY  - JOUR
T1  - On the Algebraical Analogues of Logical Relations. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 21
SP  - 497
EP  - 498
PY  - 1872/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1872.0093
M3  - doi:10.1098/rspl.1872.0093
AU  - Ellis, A.
ER  -