TY  - JOUR
T1  - On Mr. Spottiswoode's Contact Problems. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 21
SP  - 425
EP  - 425
PY  - 1872/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1872.0087
M3  - doi:10.1098/rspl.1872.0087
AU  - Clifford, W.
ER  -