TY  - BOOK
AU  - Mayaud, P. N
TI  - A hundred year series of geomagnetic data 1868-1967: indices as storm sudden commencements
T2  - IAGA Bulletin; no. 33
PY  - 1973///
CY  - Paris
PB  - IUGG Publications
KW  - Astronomy and Astrophysics Thesaurus
KW  - Geomagnetism
ER  -