TY  - JOUR
T1  - On the Calculus of Factorials. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 22
SP  - 434
EP  - 435
PY  - 1873/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1873.0084
M3  - doi:10.1098/rspl.1873.0084
AU  - Logan, H.
ER  -