TY  - JOUR
T1  - The Diffusion of Ions Produced in Air by the Action of a Radio-Active Substance, Ultra-Violet Light, and Point Discharges. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 67
SP  - 122
EP  - 124
PY  - 1900/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1900.0008
M3  - doi:10.1098/rspl.1900.0008
AU  - Townsend, J.
ER  -