TY  - BOOK
AU  - Romana, A. 
AU  - Sabben, D. Van 
ED  - International Association of Geomagnetism and Aeronomy
TI  - Geomagnetic data 1968: rapid variations
T2  - International Association of Geomagnetism and Aeronomy; No. 12w2
PY  - 1971///
CY  - Paris
PB  - International Union of Geodesy and Geophysics 
KW  - Iaga Bulletin No.12w2Iaga Bulletin-dataIaga IndicesIugg
ER  -