TY  - JOUR
T1  - The Solar Activity 1833-1900
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 68
SP  - 285
EP  - 300
PY  - 1901/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1901.0047
M3  - doi:10.1098/rspl.1901.0047
AU  - Lockyer, W.
ER  -