TY  - JOUR
T1  - On Sun-Spot Periodicities. Preliminary Notice
JF  - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934)
VL  - 77
IS  - 515
SP  - 141
EP  - 145
PY  - 1906/02/08/
UR  - http://dx.doi.org/10.1098/rspa.1906.0012
M3  - doi:10.1098/rspa.1906.0012
AU  - Schuster, A.
ER  -