TY  - BOOK
AU  - Menvielle, Michel, ed.Berthelier, Annick, ed.
TI  - Geomagnetic Data 1981: IAGA indices aa, Am, Kp, Dst, AE, rapid variations
T2  - International Association of Geo-magnetism and Aeronomy Bulletin; No.32l
PY  - 1988///
CY  - Paris
PB  - International Union of Geodesy and Geophysics
KW  - Iaga Bulletin-data
ER  -